Rogers found that a chick's lateralisation depends on whether it is exposed to light before hatching from its egg—if it is kept in the dark during this period, neither hemisphere becomes dominant.
罗杰斯发现，小鸡的偏侧性取决于它在孵出蛋之前是否暴露在阳光下——如果在这段时间里保持黑暗，右脑或左脑都不会占优势。
I encountered many hikers who were headed to a distant camp-ground with just enough time to get there before dark.
我遇到许多徒步旅行者，他们正前往一个遥远的露营地，他们刚好可以在天黑前到达那里。
They do chores at home and hopefully manage to find some time to study before it gets dark.
他们在家做家务，希望能在天黑前找到时间学习。
They don't meet in the daytime; they meet either early before light, at dawn, or after dark, at night.
他们不在白天见面；他们要么在黎明前相遇，要么在黄昏后相遇。
Just before the lights turned dark, I saw my father rush into the hall and take the seat beside my mother.
就在灯变暗之前，我看见我的父亲冲进大厅，坐在我的母亲旁边。
Two men who were caught stealing property after it grew dark have appeared before the local Magistrates' court this morning.
两名在天黑后偷东西被抓住的男子今天上午在当地治安法院前出现。
Very soon after, Heidi had gone up, before it was quite dark, the old man also sought his bed.
很快，海蒂就睡着了，天还没黑，老人也上床睡觉了。
Ed struggles for an answer, but this Christmas Day he found it - Wang Fanghe, a 61-year-old Miao gentleman who led us over the mountain ridge to Jianhe before dark.
埃德苦苦想着答案。但是在这个圣诞节他找到了答案——王方和，一位61岁的苗族老人，他带着我们翻过山脊，在天黑之前到了剑河县。
After telling me I'd never make it home before dark, he invited me to come and stay with him and his family in Tewkesbury.
然后他告诉我，我在天黑之前不用赶着回家，他邀请我去他在修克斯·贝尔的家和他家人待一下。
"The women and men who now have to be in unsafe situations such as jumping in cars before they're seen, sneaking into dark allies to apply the trade, would have safe places to be, " she said.
她说”这些男人和女人现在不得不在不安全的状态下工作，比如，还没有看清楚那车就跳了进去，鬼鬼祟祟地在黑暗的角落进行交易，本来是可以在安全地方进行的。
Before the 70's, before the character in Dark Shadows in the 60's they were monsters; there was always someone there to rescue the girl.
在70年代以前，在60年代的《黑暗阴影》以前，它们是怪物，总有个角色会冲出来英雄救美。
It was often dark outside before he came home, and the outdoors became a murky dreamland where only grown-ups had the power to make their way.
在他回来之前，外面天就黑了，变成只有大人们才有能力找到路的昏暗的世界。
I have never had any problem with graveyard or anything like that before and I'm not afraid of the dark.
我以前没在墓地之类的地方遇到过麻烦，我也不怕黑。
First, they don't meet in the daytime; they meet either early before light, at dawn, or after dark, at night.
首先，他们不在白天聚会，要么在天亮前的黎明，要么在天黑后的夜晚。
She played hard-to-get, or the One That Got Away, nudging the line before drifting down towards the dark serene.
在她重新回到静谧的暗处之前，她会轻触鱼线，像是在玩“hard-to-get（一种游戏）”，或者“the OneThat GotAway（一种游戏）”。
LL: Li Hua, I told you that we need to hit the road by 9:00 am if we're going to make it to my parents' house before dark.
我知道！你说过要在天黑以前到，9点前就必须出发。
The Cassini images also revealed a never-before-seen large, dark oval around 60 degrees north latitude that rivaled Jupiter's Great Red Spot in size.
卡西尼号拍摄的图像还在北纬60度发现了一个以前从未见过的巨大的、深色椭圆形环状体，大小与木星的大红斑相同。
FLATOW: You mentioned before, when we talked about dark flow, that extraordinary claims require extraordinary evidence.
伏拉汤姆：当我们谈论黑暗流时，你提到过，非凡的主张需要有非凡的证据来支持。
To appreciate the flavors of each type of fish, start with mild, light-colored varieties before progressing to fattier, bolder-tasting dark fish.
为了品尝每一种鱼的味道，从颜色浅味道温和的品种开始吃，渐渐过渡到脂肪含量更高味道更重的深色鱼类。
"Today, we know that 74 percent of the universe consists of this dark energy," Riess wrote on his website before the award was announced.
“今天，我们了解到74%的宇宙由暗能量组成，”宣布获奖前，里斯在自己的网站写道。
By day we canoed the waterways, spotting turtles, eagles and beavers before swimming in the dark brown waters off Slapfoot Beach.
白天我们在河上划船，看见海龟，苍鹰和海狸，然后我们跳进斯莱普·弗特海滩棕黄色的海水里去游泳。
Apparently it's admiration that drives people through the many dark nights of the soul that come before success.
显然，正是崇拜使然，人们才能穿越成功之前的很多灵魂黑夜。
He reached London before dark.
他天黑前到达伦敦。
He didn't attend her birthday party as he had to get hack to school before dark.
他没有出席她的生日晚会，因为他必须在天黑之前回到学校。
You'd better hit the road right now if you want to be there before dark.
如果你想天黑之前到那里的话，你最好现在就动身。
I'll see about the gravediggers. Only the top layer of soil is frozen. I think it can be ready before dark.
我去找挖墓的人。土只是上层结冰。我想天黑前就可以挖好了。
I'll see about the gravediggers. Only the top layer of soil is frozen. I think it can be ready before dark.
我去找挖墓的人。土只是上层结冰。我想天黑前就可以挖好了。
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