在离开办公室之前，她小心翼翼地重设了警报器。
She was careful to reset the alarm before she left the office.
之前他从没有听过她这样失态、绝望地哭泣。
He had not heard her cry before in this uncontrolled, hopeless way.
在我们制定计划之前，我们最好详细地讨论每件事。
We'd better discuss everything in detail before we work out the plan.
与此同时，茅膏菜的叶子则渗出粘稠甜美的液体，这种液体首先把昆虫吸引过来，然后在树叶“啪”地合上之前紧紧抓住它们。
The Drosera sundew, meanwhile, has a thick, sweet liquid oozing from its leaves, which first attracts insects, then holds them fast before the leaves snap shut.
年轻人较早接触互联网可能会受益，因为他们可以更早地开始学习过程，并在开始接受正规教育之前抢占先机。
Young people might benefit from early exposure to the Internet for they can start their learning process earlier and get ahead of the game before they start formal schooling.
“要是在我死之前能听到海蒂的声音就好了。”这个可怜的老妇人日复一日地叫喊着。
"If only I could hear Heidi's voice before I die," the poor old woman would exclaim, day after day.
主动学习者不断地监测自己的理解，他们知道自己的理解什么时候出现了问题，在迷失方向之前就会寻求帮助。
Active learners are constantly monitoring their understanding, they know when their comprehension breaks down, and they ask for help before they become lost.
在控制室内，物理学家和工程师们小心翼翼地在隧道的一部分将光束击落，在其完成全程之前把它拦截下来。
Inside the control room, physicists and engineers cautiously shot the beam down part of the tunnel, stopping it before it went all the way around.
在汽车起动之前的短暂的一瞥里，Martin注意到大衣口袋，一边鼓鼓囊囊地塞着书，另一边鼓鼓囊囊地塞着一夸脱瓶装的威士忌酒。
In the fleeting glimpse before the car started up, Martin noted the overcoat pockets, one bulging with books, the other bulging with a quart bottle of whiskey.
人们常常在火车停下之前错误地打开车门。
People often wrongly open doors before the train has come to a stop.
她在回答之前意味深长地停顿了一下。
多数人不能清楚地记得3到5岁之前的多少事情。
Most people cannot consciously remember much before the ages of 3 to 5 years.
在哥伦布发现美洲大陆之前，大洋洲无可争议地存在着一种在新大陆被驯化的红薯，它有时被用来支持Heyerdahl的“太平洋上的美洲印第安人”理论。
The undisputed pre-Columbian presence in Oceania of the sweet potato, which is a New World domesticate, has sometimes been used to support Heyerdahl's "American Indians in the Pacific" theories.
栗子中害虫的命运在到达目的地之前是未知的。
The destiny of the pest in the chestnut is not known before reaching the destination.
在我意识到之前，不知怎么地答案从我的嘴里溜了出来：“没有，先生。”
The answer somehow slipped from my tongue before I realized it: "No, sir."
“我希望在你离开我之前我能睡着。”他相当害羞地说。
"I wish I could go to sleep before you leave me," he said rather shyly.
在她离开实验室之前，她把每件东西都准确地放在它们原来的位置上。
Everything was placed exactly where it used to be before she left the laboratory.
约翰跑得太突然了，风筝从她手中飞了出去，像之前一样直直地摔了下来。
John ran off so suddenly that the kite flew out of her hand and it fell flat as before.
这里列出了一些需要记住的重要事情，这样你就能确切地知道在你出发之前你需要做什么。
Here is a list of important things to remember, so you know exactly what you need to do before you take off.
在走上讲台进行演讲之前，我把我要说的话又一字不差地重复了一遍。
Once again I went over exactly what I needed to say before I mounted the platform and gave my speech.
我希望他们记得我和他们一起欢笑，和他们一起玩，记得在他们会正确地说独木舟这个单词之前教他们如何去划独木舟。
I hope they remember me laughing with them, playing with them, teaching them how to paddle kayaks before they could say the word kayak properly.
"这本书将详细地介绍有关小冰河时期和其它气候变化的研究过程，但是，在我开始之前，让我先介绍一下历史背景。
This book will provide a detailed examination of the Little Ice Age and other climatic shifts, but, before I embark on that, let me provide a historical context.
这些措施将有助于我们减少军事风险、在危机和冲突爆发之前有所行动，并确保政府能够更好地服务于它们的人民。
These measures will help us diminish military risk, act before crises and conflicts erupt, and ensure that governments are better able to serve their people.
在你被你的小场景冲昏头脑之前，温兹摩尔小姐，我很遗憾地再次告诉你，我们不打算进入电视行业。
Before you get carried away with your little scene, Miss Wenzmore, I regret to have to tell you again that we are not planning to go into television.
第二天之前，又有三个仆人死了，其他人惊恐地逃走了。
Before the next day, three other servants were dead and others had run away in terror.
红树林根系有能力吸收并很好地截留水中的沉积物和污染物，这些沉积物和污染物在进入海洋之前流经这些根系。
Mangrove root systems have the ability to absorb and well trap sediments and pollutants in water that flows through them before they enter the ocean.
真正的太空竞赛是我们是否会在太空计划的资金耗尽之前，在地球以外的其他星球建立殖民地。
The real space race is whether we will colonise off Earth on to other worlds before money for the space programme runs out.
北美歌雀在切换到另一种类型之前，会一声一声地重复其中的一种，与之不同的是，北美歌雀会连续地创作更长的、更多变的歌曲，而不会重复。
Unlike the song sparrow, which repeats one of its several song types in bouts before switching to another, the warbler continuously composes much longer and more variable songs without repetition.
2007年，在他成为首相之前，很少有人发出尖锐的反对声；其后，一些人几乎不断地发牢骚。
Before he became the prime minister in 2007, few people raised a squeal of protest; since then, some have been grumbling almost constantly.
尽管智人在那个时候还不存在，但这一发现并不能为认为在智人之前就有节制地使用火的说法提供任何依据。
Although homo sapiens did not exist at that time, this discovery provides no basis to the claim that the controlled use of fire preceded the Homo sapiens.
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