The wooden footbridge over Kessel Ravine is the only way to the research plateau. It has one problem. Its lock thinks it is a puzzle.
凯瑟尔峡谷上的木头人行桥，是通往研究高地的唯一通道。它有一个问题：它的锁以为自己是个谜题。
Inge arrives at the west end at six in the morning. She carries a sample case and a plan. She is a soil scientist, and she has waited two years for this measurement. The plateau has a layer of dark earth that nobody has studied. Whoever records it first will have a paper, a prize and a reputation.
英格早上六点来到西端。她带着一只采样箱和一份计划。她是土壤学家，为了这次测量，她已经等了两年。高地上有一层深色的泥土，从来没人研究过。谁先把它记录下来，谁就能得到一篇论文、一个奖项和一份声誉。
A gate of dark timber blocks the bridge. Beside it, a small screen glows on a post. A message scrolls across the glass.
一扇深色木头做的门拦住了桥。门边的立柱上，一块小屏幕亮着。一条信息在玻璃上滚动。
"Bridge control is in safe mode. Solve the crossword to continue. Both ends must agree."
“桥梁控制系统处于安全模式。请解开填字游戏以继续。两端必须一致。”
Inge reads the message twice. She taps the screen, and a grid of white squares appears. Only half the clues are visible. The others are missing.
英格把信息读了两遍。她点了点屏幕，出现了一格格白色方块。只有一半的提示看得见。其余的都不见了。
"Both ends," she says out loud. "That is ridiculous."
“两端，”她大声说，“太荒唐了。”
Across the ravine, far away, someone shouts. Inge shades her eyes. A small figure in a yellow jacket stands at the east gate. She knows that jacket. It belongs to Fatou, a rival scientist from another institute. Fatou has beaten her to two grants in three years.
峡谷对面，很远的地方，有人在喊。英格用手遮住眼睛。东门那儿站着一个穿黄夹克的小小身影。她认得那件夹克。它属于法图，另一家研究所的竞争对手。三年里，法图已经两次抢在她前头拿到了经费。
"Good morning, Inge!" Fatou calls. Her voice carries easily across the gap. "Are you stuck too?"
“早上好，英格！”法图喊道。她的声音轻易地越过了峡谷。“你也被困住了吗？”
"I am not stuck," Inge shouts back. "I am waiting for the screen to load."
“我没被困住，”英格也喊回去，“我在等屏幕加载。”
"The screen is loaded. Mine shows the down clues. Yours must show the across clues. The gate wants both of us."
“屏幕已经加载好了。我这边显示的是竖向提示。你那边一定显示的是横向提示。这扇门需要我们俩。”
Inge says nothing. She does not want to need Fatou. She wants to cross the bridge alone, sample the soil alone and write the paper alone. But the screen does not care what she wants.
英格没有作声。她不想需要法图。她想一个人过桥，一个人采集土壤，一个人写论文。可屏幕才不管她想要什么。
She scrolls through the across clues. There are seven, and she knows five answers at once. The first is simple: a seven-letter word for a long fall of water, which is CASCADE. The second asks for a sticky sap from a tree, and she types RESIN. The squares fill in with a soft chime.
她翻看着横向提示。一共有七条，其中五个答案她马上就知道。第一条很简单：七个字母，指一长串落下的水，答案是 CASCADE。第二条问的是树上黏黏的汁液，她输入了 RESIN。方块随着一声轻柔的提示音填满了。
Across the ravine, Fatou lets out a cheer. "That worked! My letters are changing!"
峡谷对面，法图欢呼了一声。“成了！我这边的字母在变！”
"Mine too," Inge admits.
“我这边也是，”英格承认。
They work for twenty minutes. Each woman reads a clue aloud, and the other answers if she can. They argue about a word for a type of rock and decide on SHALE. They argue about a word for "to measure depth" and decide on SOUND. It is strange to be so close to someone and still be so far away. Inge begins to hear how quickly Fatou thinks, and she does not enjoy it.
他们干了二十分钟。每个人读出一条提示，另一个人能答就答。他们为一种岩石的名称争了起来，最后定为 SHALE。又为“测量深度”的那个词争了起来，最后定为 SOUND。离一个人这么近，却又隔得这么远，感觉很奇怪。英格开始领教法图思考得有多快，而她并不喜欢这一点。
After half an hour, only one clue remains. The last square flashes on both screens.
半个小时后，只剩下一条提示。最后一个方块在两块屏幕上同时闪烁。
"Seven letters," Inge reads out. "A person you work with, not against."
“七个字母，”英格念道，“一起共事而不是对着干的人。”
There is a long silence across the ravine.
峡谷对面沉默了很久。
"I do not like this clue," Fatou calls.
“我不喜欢这条提示，”法图喊道。
"Neither do I."
“我也不喜欢。”
"It is a trick," Fatou says. "The answer is obvious. It is PARTNER. P, A, R, T, N, E, R."
“这是个陷阱，”法图说，“答案很明显。是 PARTNER。P，A，R，T，N，E，R。”
"I can count," Inge says. "But look at the screen. It says my panel accepts only the odd letters. The first, the third, the fifth and the seventh."
“我会数数，”英格说，“可是看看屏幕。上面说我这块面板只接受单数位的字母。第一个、第三个、第五个和第七个。”
"Mine accepts only the even ones," Fatou says. "The second, the fourth and the sixth."
“我这边只接受双数位的，”法图说，“第二个、第四个和第六个。”
Inge looks at the screen again. The message at the bottom reads: "Enter all letters within ten seconds. Each end holds half the word."
英格又看了看屏幕。底部的信息写着：“十秒内输入所有字母。每一端各掌握半个词。”
"So we must type at the same moment," she says slowly.
“这么说我们必须同时输入，”她慢慢地说。
"And we must trust each other to type the right letters."
“而且我们得信任对方，相信她输入的是对的字母。”
Inge looks across the ravine. A sudden gust of wind makes the bridge creak. The water at the bottom is a thin white thread, very far below. For the first time, she sees what the gate was designed to do. It does not test whether she is clever. It tests whether she can stand next to someone she does not like and still do her half.
英格望向峡谷对面。一阵突然的风让桥吱呀作响。底下的水只是一条细细的白线，在很远很远的下面。她第一次看明白了这扇门的设计用意。它不是在测试她是不是聪明。它是在测试，她能不能站在一个自己不喜欢的人旁边，依然做好自己的那一半。
"All right," she says. "We do it once, and we do it carefully."
“好吧，”她说，“我们做一次，而且要做得仔细。”
"On three?" Fatou asks.
“数到三吗？”法图问。
"On three. I will count out loud."
“数到三。我来出声数。”
She puts her finger over the first key. Her hand is steady, but her heart is going fast. She takes a breath.
她把手指放在第一个键上。她的手很稳，心却跳得很快。她吸了一口气。
"One," she says. "Two. Three."
“一，”她说，“二，三。”
She presses the P. Across the gap, nothing answers. Fatou is still looking for her key.
她按下了 P。峡谷对面毫无反应。法图还在找她的键。
"Wait, wait!" Fatou calls. "I was not ready!"
“等等，等等！”法图喊道，“我还没准备好！”
The countdown ticks from ten to eight to six. Inge hurries to the R. Fatou presses the A far too late. The order of the letters is wrong, and the screen blinks twice. Then the line of green turns white, and the word disappears.
倒计时从十跳到八，又跳到六。英格匆忙去按 R。法图按下 A 的时候已经太晚了。字母的顺序错了，屏幕闪了两下。然后那一行绿色变成了白色，这个词消失了。
"Fatou," Inge calls. "You are one letter behind me."
“法图，”英格喊道，“你比我慢了一个字母。”
"You are going too fast!"
“是你太快了！”
"The gate wants the letters in order," Inge says. "I type one, you type one. We cannot both rush."
“这扇门要字母按顺序，”英格说，“我输一个，你输一个。我们不能都抢。”
They look at each other across the ravine and, at the same moment, they both start to laugh. It is a short, helpless laugh, the kind that comes when a plan falls apart.
她们隔着峡谷看着对方，同一时刻，两人都笑了起来。那是短促而无奈的笑，计划落空时才会有的那种笑。
"Let us start again," Inge says. "This time I will say each letter out loud before I press it."
“我们重新开始，”英格说，“这回我按每个字母之前，先把它大声说出来。”
"And I will say mine back to you," Fatou answers.
“我也把我的说给你听，”法图回答。
They reset the screens. Inge reads each letter slowly, as if she is teaching a child to read. Fatou repeats it and then presses her own. When Inge says, "Fifth letter, N," Fatou says, "I have the sixth. E." The ding rings across the gap, one after another, a quiet line of notes.
她们重置了屏幕。英格慢慢地读每个字母，像在教小孩子认字。法图重复一遍，然后按下自己的键。英格说“第五个字母，N”的时候，法图说：“我是第六个。E。”提示音一声接一声地响过峡谷，像一行安静的音符。
At the seventh letter, Inge pauses.
到了第七个字母，英格停了一下。
"R," she says.
“R，”她说。
"R," Fatou answers.
“R，”法图回答。
They press together. For one long second, nothing moves. The wind drops. The creaking stops. The screens turn green.
她们同时按下。有那么漫长的一秒，什么都没动。风停了。吱呀声也停了。屏幕变成了绿色。
"Bridge unlocked," the message says. "Thank you for your cooperation."
“桥梁已解锁，”信息写道，“感谢您的合作。”
The gate swings open on both sides. The two women start to walk toward the middle of the bridge, slowly at first and then quicker. Inge's sample case thumps against her back. Fatou waves a hand in the air like a flag.
两端的门同时打开。两个女人朝桥中间走去，起初很慢，然后越来越快。英格的采样箱在她背上砰砰作响。法图在空中挥着一只手，像挥一面旗。
They meet at the exact centre of the span, where the planks are wide and old. Up close, Fatou has dark circles under her eyes and a smudge of ink on her cheek. She looks as tired as Inge feels.
她们在桥面正中间相遇，那里的木板又宽又旧。凑近了看，法图的眼睛下面有黑眼圈，脸颊上还有一块墨迹。她看上去和英格感觉到的一样疲惫。
"We could write the paper together," Fatou says. "Two names, one measurement."
“我们可以一起写论文，”法图说，“两个名字，一次测量。”
Inge thinks about the prize and the reputation. Then she thinks about the seven letters and the ten seconds.
英格想到了奖项和声誉。然后她想到了那七个字母和那十秒钟。
"Alphabetical order?" she asks.
“按字母顺序？”她问。
"I come first," Fatou says. "F before I."
“我排第一，”法图说，“F 在 I 前面。”
Inge grins. She offers her hand, and Fatou takes it.
英格咧嘴笑了。她伸出手，法图握住了它。
Behind them, the east gate swings shut, and the latch drops with a short, clean click.
她们身后，东门合上了，门闩落下，发出短促而干脆的咔哒一声。
