坐在后排的学生可能不会讲太多，但在大教室里，可能很难看到黑板，也很难听到老师在说什么。
At the back, students probably won't speak much, but in big classrooms, it can be hard to see the board and hear what the teacher is saying.
这么大的原子核不可能是稳定的，但在足够长的时间内，在真空附近组装一个原子核以观察真空的衰变是可能的。
A nucleus that large cannot be stable, but it might be possible to assemble one next to a vacuum for long enough to observe the decay of the vacuum.
在1837年大恐慌前的10年里，劳工运动积累了一些势头，但在随后的大萧条中，劳工的力量崩溃了。
The labor movement gathered some momentum in the decade before the Panic of 1837, but in the depression that followed, labor's strength collapsed.
尽管所有的人际关系都会要是有困难的时候，但在婚姻的关系中出现问题的时间占了一大半，那这个婚姻关系就很危险了。 事实上，就像梅奥诊所指出的，在婚姻关系中，障碍和困境出现以后，大约有半数最终都离婚了。
While all relationships can experience difficult times, a marriage that has more problems than positive moments may likely deteriorate.
但在大剂量使用的情况下，刺激太过分，会导致发抖、焦虑和失眠。
In high doses, though, this stimulation can go too far, causing jitters, anxiety and insomnia.
这些疾病是世界上许多地方的“三大杀手”，但在非洲尤其是这样。
These are the “big three” killers in many parts of the world, but most especially so in Africa.
艾达的父亲是诗人拜伦勋爵，但在她一个月大的时候，她的父母分离了。
Ada's father was the poet Lord Byron, but her parents separated when she was a month old.
但在阿肯色的某些地区，那儿土壤稀松，夏季炎热，那些地方最适宜种植西瓜，种出来的西瓜个大味甜，只是你真要适应吃这么大的西瓜还是有点困难的。
But in this part of Arkansas, where the soil is sandy and the summer hot enough at just the right time so the watermelons grow particularly sweet and big, that kind of change comes hard.
的确，在相对的基础上，上四年大学的回报正在接近其历史高位，但在很大程度上，(出现这种现象的原因)是针对没有大学学历的人的预期一直是走平或下跌的。
Indeed, on a relative basis, the return on a four-year degree is near its historic high. But that's largely because the prospects facing people without a college degree have been flat or falling.
鲁斯的重击让观众激动万分，扩大了棒球的吸引力，让看台坐满了观众，但在麦格劳看来他只不过是个强击手，“大狒狒”或“大猿”。
Ruth’s slugging thrilled the crowds, broadened baseball’s appeal and filled the stands, but for McGraw he was a mere slugger, “the Big Baboon” or “the Big Ape”.
这样的事还没有发生在目前的金融危机中，但在大萧条时期，它戏剧地发生在1933年初的短短十天之中，就在富兰克林·罗斯福上任的前夜。
It has yet to happen with the current crisis. But for the Depression it struck dramatically over a mere ten days in early 1933, just before Franklin Roosevelt took office.
这样的事还没有发生在目前的金融危机中，但在大萧条时期，它戏剧地发生在1933年初的短短十天之中，就在富兰克林·罗斯福上任的前夜。
It has yet to happen with the current crisis.But for the Depression it struck dramatically over a mere ten days in early 1933, just before Franklin Roosevelt took office.
对于用户名和密码而言，这看起来不是大问题，但在其他一些情况下，需处理的数据量可能大很多。
Not such a big deal for usernames and passwords, but other scenarios built in the same way may need more data.
虽然浮油部分被云笼罩，但在两个区域依稀可辨：一条蛇形油膜带靠近密西西比三角洲、一大片浮油环绕着密西西比以南的阿拉巴马州边缘。
Although partially obscured by clouds, oil is discernible in two areas, a serpentine slick near the Mississippi Delta, and a large round slick south of the Mississippi-Alabama border.
但在这个区域传统美食清单中仍有仍有一大漏洞：夏季菜单。
But even that suffers from the biggest hole in the region's traditional repertoire: the summer menu.
但在这样大的区域铺设电缆耗资巨大。
1997年它购买了所罗门的滑雪及运动装备品牌，但在并购锐步而成为仅次于耐克的全球第二大运动品牌后，于去年将其售出。
In 1997 it bought the Salomon ski and sportswear brand, only to sell it last year as it bought Reebok to become the world's number two to Nike.
这个行业不但在地面钻出巨大的坑，还使用轮胎大如房屋的卡车。
It is an industry that makes huge holes in the ground and relies on trucks with tyres the size of houses.
但在100年的时间范围内，使用天然气肯定比使用煤炭对气候的影响要小，但页岩气去比煤炭的影响大。
Over a 100-year timeframe, conventional gas is almost certainly better than coal - but shale gas could be worse.
湄公河也拥有700多种鱼类，包括像灰熊一样大的大鲶鱼，但在雨季的后期河水浑浊，我们没有看见一条鱼。
And while the Mekong heaves with more than 700 varieties of fish, including a catfish as big as a grizzly bear, the water was too opaque, at the end of the rainy season, for us to see any of them.
虽然在太空的速度很快，但在看景色时几乎注意不到速度有这么大。
Though hurtling through space, the senses are rarely aware of the velocity.
中国是全球最大的煤矿生产国(第二大煤炭生产国与中国年产量相距甚大)，但在过去的几十年间已经开始向国外进口煤炭了，并且在未来对这些进口煤炭的依赖只会有过之而无不及。
China, the world's biggest coal producer by some distance, has turned to foreign suppliers over the past couple of years and is likely to rely on them even more in future.
这个在人类后脑勺上安装摄像头的想法听起来可能有些极端，但在这个遍布摄像头的社会里，该想法或许能激发人们关于隐私问题的大讨论。
The latest example of installing a camera on the back of someone's head may sound extreme, but it could perhaps spark some discussion about the privacy issue in a society where cameras are everywhere。
但在最后一天左右，我们对我们的排名算法做出了相当大的改善，这次改变明显影响了我们11.8%的查询。
But in the last day or so we launched a pretty big algorithmic improvement to our ranking-a change that noticeably impacts 11.8% of our queries-and we wanted to let people know what's going on.
其余时间，她工作在位于第五大道的雅诗兰黛总部。尽管雅诗兰黛年营业收入达24.8亿美元，但在运营方式上，它更像家族企业。
The rest of the time, she went to work at Estee Lauder's Fifth Avenue headquarters, which, despite its annual revenue of $2.48 billion, was run much like a family business.
在2008年和2009年大部分时间，德州成功创造就业，但在12月，却有24000人失业。
Texas created jobs during 2008 and most of 2009, but it lost 24, 000 in December.
甚至在加拿大，虽然博士数量增长相对慢一些，但在2007年大学仍授予4800个博士学位，而只雇佣了2616名新的全职教授。
Even in Canada, where the output of PhD graduates has grown relatively modestly, universities conferred 4,800 doctorate degrees in 2007 but hired just 2,616 new full-time professors.
甚至在加拿大，虽然博士数量增长相对慢一些，但在2007年大学仍授予4800个博士学位，而只雇佣了2616名新的全职教授。
Even in Canada, where the output of PhD graduates has grown relatively modestly, universities conferred 4,800 doctorate degrees in 2007 but hired just 2,616 new full-time professors.
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