This makes it easier to spot ants and to capture them before they can escape into the surrounding leaf litter.
这使得我们更容易发现蚂蚁，并在它们逃到周围落叶层之前抓住它们。
For example, the audience learns through a letter or through someone else's conversation who this mysterious gentleman is and why he left the town many years before.
例如，观众通过一封信或其他人的谈话得知这位神秘的绅士是谁，以及他多年前为什么离开这个城市。
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 accounts for our reaction to seemingly simple innovations like plastic garbage bags and suitcases on wheels that make life more convenient:"How come nobody thought of that before?"
这就解释了我们对塑料垃圾袋和带轮行李箱等看似简单的发明的反应：“为什么以前没有人想到这一点？”
This was an important business before the days of tractors when many families made a living from farming, and mules were used as work animals.
在拖拉机出现之前，这是一项重要的业务。当时，许多家庭以务农为生，骡子被用作役畜。
This accounts for our reaction to seemingly simple innovations like plastic gargabe bags and suitcases on wheels that make life more convenient: "How come nobody thought of that before?"
这就解释了为什么当我们看到像塑料垃圾袋和带轮行李箱这些让生活更方便且看似简单的发明时，我们的反应是：“为什么以前没有人想到这个?”
This accounts for our reaction to seemingly simple innovations like plastic garbage bags and suitcases on wheels that make life more convenient: "How come nobody thought of that before?"
这就解释了为什么当我们看到像塑料垃圾袋和带轮行李箱这些让生活更方便且看似简单的发明时，我们的反应是：“为什么以前没有人想到这个？”
The Councillor saw quite distinctly before him a lantern burning, and behind this a large handsome house.
司法官清清楚楚地看到，在他面前有一盏提灯正亮着，这后面是一座很大很漂亮的房子。
Several current studies are looking at these effects and I really do hope we can find a way to deal with this issue before these ecosystems are adversely affected.
目前人们针对这些影响在做一些研究，我真的希望能在生态系统遭到破坏之前找到应付这个问题的方法。
Although there are some problems to solve before this will be possible, we can certainly dream of a world where technology makes life easier and safer for millions of people.
尽管在这将成为可能之前有一些问题需要解决，但我们肯定可以梦想一个世界，在那里科技使千百万人的生活更容易和更安全。
What makes that so fascinating is that before we found the Antikythera Mechanism, the earliest device we had that could track the Sun and moon like this was invented over 1,000 years later.
让人如此着迷的是，因为在发现安提基西拉机械之前，最早能像它一样追踪太阳和月亮的设备居然要追溯到1000多年前了。
My idea was to photograph this beautiful and very unique coastline, before it's too late—as a last witnesses.
我的想法是，在为时已晚之前，作为最后的目击者，将这条美丽而独特的海岸线拍摄下来。
This comes from carefully conducted 'before and after' evaluations of interventions in schools, monitored by a research team.
这是一个研究小组对学校干预措施实行前后仔细评估得出的结论。
This method tells you all information you need to know: whether one node is descendant of an ancestor of the other, whether it is before or after, and so on.
这个方法告诉您所有想知道的信息：一个节点是否是另一个节点的祖先的后代，它是在前面还是后面呢，等等。
Heidi still looked at her book before going to bed that night, and this book became her dearest treasure.
那天晚上海蒂睡觉前还在看她的书，这本书成了她最心爱的宝贝。
My idea was to photograph this beautiful and very unique coastline, before it's too late—as a last witness.
我的想法是，在还来得及之前——作为最后的见证者，我要拍下这些美丽、举世无双且历史悠久的海岸线。
We are reminded of this even before we view a collection by the presence of security guards, attendants, ropes and display cases to keep us away from the exhibits.
甚至在我们参观藏品之前，保安、服务员、绳子和陈列柜都会提醒我们不要靠近展品。
A month before my first marathon, one of my ankles was injured and this meant not running for two weeks, leaving me only two weeks to train.
在我第一次参加马拉松比赛的前一个月，我的一只脚踝受伤了，这意味着两个星期不能跑步，只剩两个星期的训练时间。
Logically we should learn about things before doing them and that is presumably why the experts enforce this in our educational system.
从逻辑上讲，我们应该在做事之前先了解清楚，这大概就是专家们在我们的教育体系中强制推行这一做法的原因。
This is America, and America has risen to these challenges before.
这是美国，且美国以前也曾应对过这些挑战。
He had helped me lift the veil that grows so quickly over our eyes in this hectic world, and to see all those things I'd failed to marvel at before.
在这个忙乱的世界里，他帮我揭开了迅速遮住我们眼睛的面纱，让我看到了所有那些我以前没有惊叹过的事物。
Will you overlook it this once and forgive me, and let things go on as before?
你能不能原谅我这一次，让事情像以前一样继续下去？
I found, as Hacker observed years before, that most wives want their husbands to be, first and foremost, conversational partners, but few husbands share this expectation of their wives.
我发现，正如哈克多年前观察到的那样，大多数妻子希望丈夫首先是谈话伙伴，但很少有丈夫对妻子有这样的期望。
The mums and dads had not seen any competition like this before.
妈妈和爸爸还从未看到过这样的比赛。
She had not known before that this was one of the things which made her feel sour and cross.
她以前不知道这是使她感到酸楚和生气的事情之一。
This is the fifth and probably final day of testimony before the Senate Judiciary Committee.
这是第5天，也可能是最后一天在参议院司法委员会面前作证。
We had never experienced this kind of holiday before and had no idea what to expect.
我们以前从未经历过这种假期，不知道有什么可期待的。
Our hope is that if we feed blueberry juice to a child with this type of tumour, we can intervene and shrink the tumour before it becomes a big problem.
我们的希望是，如果我们给患有这种肿瘤的儿童喂蓝莓汁，我们就能在其成为大问题之前进行干预并缩小肿瘤。
The second option also involved going over to the shelf but, this time, removing the book and then subtly holding onto it for just an extra moment before placing it in the customer's hands.
第二种选择是走到书架前，但是这次，把书拿开，然后稍微多拿一会儿，再把书放到顾客手中。
This was before the steam locomotive, and canal building was at its height.
这些事情都发生在蒸汽火车出现之前，而且，运河修建在那时正处于繁荣时期。
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