This break in Earth's history is marked by a mass extinction, when as many as half the species on the planet became extinct.
地球历史上的这次重大灾难以物种的大量消亡为标志；当时，地球上多达一半的物种都灭绝了。
If the kids break down and stomp and scream on the airplane, remember that half of the people there have been in your shoes.
如果孩子在飞机上失控、跺脚、大声尖叫，记住半数人会站在你的立场上。
She would break my biscuits in half to be certain I wouldn't choke.
她会把我的饼干掰成两半，以确保我不会噎着。
Last year, when attempting to break the record, the cheese broke in half when it was being turned.
去年，这块干酪准备打破世纪纪录时，在翻面的过程中断成两半。
At half time, with the weather closing in, the two captains and both managers suggest forgoing the halftime break: they'd rather just change ends and carry on.
在中场休息的时候，天气正渐渐变暗，两支队伍和他们的经理都建议放弃中场休息：他们宁愿仅交换场地并继续比赛。
He'll also use his athleticism to get out and run with Parker and Ginobili on the break and as a slasher in the half court.
他会利用他的长度来给对手带去压力，他还能和帕克还有吉诺比利一起快下，完成半场的快攻组合。
And Richard... will never be able to get himself all around this, it will break him in two-half.
还有理查德……将永远无法面对这一切，这会给他带来巨大打击。
Lorry drivers in the European Union are not allowed to drive for more than four and a half hours without taking a break.
欧盟的卡车司机不允许连续开车超过四个半小时。
A day and a half later the routine, captured by hidden cameras, showed up during a break in the reality television show "Celebrity Big Brother."
一天半过后，由隐藏起来的摄像机拍摄的这段舞蹈动作在电视真人秀节目《名人老大哥》的一个广告时段中插播。
You're less likely to wind up wasting hours on the Internet or playing games on your phone, if you know you'll get another break in a half an hour or so.
如果你知道在大约半小时之后你就能再次休息，那么你很可能就不会耗费几个小时用手机上网、玩游戏了。
Last year, when attempting to break the record, the cheese broke in half when it was being turned. Cheese-turning allows it to ripen evenly.
去年，这块干酪准备打破世纪纪录时，在翻面的过程中断成两半。干酪必须要在均匀熟透的情况下才能被翻转。
As Arsenal pressed onto the front foot in the second-half, Chelsea looked increasingly threatening on the break.
下半场一开始阿森纳率先发难，切尔西的半场看起来威胁不断。
The vote in the Senate was always a formality, so much so that a large number of the senators had already left for the half-term break and voted on this bill by proxy.
议会的投票通常只是一个形式，大量议员已经离开进行中期休假，都是以委托的形式进行投票。
In mice with normal ovaries and approximately half the normal concentration of FSH, bone mass increased due to a decline in bone resorption by cells known as osteoclasts, which break down bone.
卵巢功能正常和FSH接近正常浓度一半的小白鼠，由于破骨细胞的破骨作用引起骨吸收作用的减弱，从而使骨量增加。
Over the course of its on-air tenure, Fox began running "24" in the second half of the season without a break in original episodes.
在播出期间，福克斯会不中断地将这一季“24”后半段按计划播完。
I think both sides found it tricky in the first half with the gale-force winds and driving rain but we were strong after the break.
我想上半场那种风雨交加的天气令比赛双方都会感到很难办，但我们在破门之后逐渐找到了感觉。
In a survey of 1,000 office workers, two out of five said they were too busy to take a proper lunch break, while over half branded colleagues who eat strong-smelling food as 'anti-social'.
在对一千名员工开展的调查中，五分之二的受访者说中午没有时间好好用餐，有超过半数的受访者说吃强烈刺激性食物的同事“反社会”。
Break in the egg, pour in half of the milk and a quarter of a teaspoonful of salt.
打蛋，连同一半的牛奶和四分之一的一茶匙盐一起倒入面粉中间。
After this round trip, the crew had a scheduled break for around two and a half hours, in which they were described to be well rested and talkative.
经过这一轮的旅程，机组人员有一个预定的休息时间约2个半小时，在其中他们被描述为精神状态良好。
After being tied with Seattle at 54-54 at the break, the Lakers methodically pulled away in the second half behind a strong all-around game from Kobe Bryant to win, 106-99.
在以54平结束上半场之后，在下半场湖人在全能科比。布莱恩特的强有力的带领下，有条不紊地拉开了比分，并以106-99赢得了比赛。
In the first half we focused above all on holding them out, but during the break we discussed it and realised if we continued like that, Milan would score sooner or later.
在上半场比赛中我们首要的任务是集中精力去防守住他们，但是在中场休息的时候我们讨论了一下并且意识到如果我们一直这样做，那么米兰迟早会进球。
With education, couples in which neither partner has studied much are the most likely to break up. Those where both are well educated are half as likely to divorce.
从受教育程度看，受教育水平都很低的夫妻最容易离婚。而双方都接受过良好教育的夫妻离婚几率会减半。
In the first half we had some difficulties, then we did really well after the break.
上半场我们遇到了一些困难，但是中场休息之后我们有了很大的起色。
In the first half we had some difficulties, then we did really well after the break.
上半场我们遇到了一些困难，但是中场休息之后我们有了很大的起色。
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