The oldest of these, as far as we know, was the Indo-European family of languages, which were beginning to be spoken clear back during the Stone Age.
据我们所知，其中最古老的语言是印欧语系。 远在石器时代人们就开始使用印欧语了。
It is not clear how many of them will be heading back to Saudi Arabia tomorrow.
尚不清楚他们当中有多少人明天将折回沙特阿拉伯。
You know, I am still not too clear about the hydrologic cycle, the transfer of water back and forth between the earth and the atmosphere.
你知道，我仍然不是很清楚水文循环，也就是水在地球和大气之间的来回转移。
Remember to clear concertina sections out when you come back from trips to avoid your unwashed briefs billow out onto the boardroom table.
记得出差回来清空检查一下手风琴夹层，避免在会议上找文件时把你未洗的短内裤抖出来。
Anyone with a clear mind would just turn back.
任何头脑清醒的人都会回头。
An intricate set of metal layers focuses and manipulates incoming radio waves, allowing the tag to send back a clear signal.
这套装置以一系列精巧的金属片来聚焦和操控入射的无限电波，使标签将清晰的信号反射回来。
If you simply sit back and let life unfold without a clear focus, the results may not be to your liking.
如果你什么都不做也没有明确的目标，仅仅让生活自己展开，那你得到的结果也许并非是你所喜欢的。
He should press American Allies to lay out similar principles when the Group of 8 industrialized nations meets this month in France and back them up with clear offers of support.
当本月8大工业国集团聚首法国之时，他应该向美国的盟友施压，要求它们也陈列出类似的原则，并以清楚有力的支持来声援它们。
Although the genes seemed to turn back off once the cells were pluripotent, it wasn't clear how they might influence the cells' later behavior.
一旦细胞变为多能细胞，那些多余基因可能会被回退并关闭，但他们对细胞日后的生长会产生怎样的影响还并不清楚。
I didn't realize this at the time, but thinking back, it's very clear to me what my real motives were.
我没有意识到这一点，但回头想想，我真正的意图是什么就很清楚了。
"That aside, the Dow added 202 points yesterday and gold is in retreat, two clear signs that some confidence is seeping back in to equity markets now," Potter added.
姑且不提，昨天道琼斯指数上升了202点并且黄金市场也在逐渐后撤，两个明显的征兆表明目前投资者的信心逐渐向股市靠拢。“波特又加到。”
Without the ECB back, it is clear how quickly that 1 trillion euros can be soaked up.
显然，没有欧洲央行的支持，1万亿欧元可能很快就会消耗殆尽。
The deal was clear: to secure lower interest charges, Ireland had to back down on tax.
这是一个再清楚不过的交易：为了确保低贷款利率，爱尔兰不得不在税收上让步。
When I look back over 2010, in a general sense, it's clear to me now that my time was not very balanced at all.
当我回望我的2010年时，总的来说，我的时间安排明显完全失去了平衡。
What we've shown is that there are three clear migration routes as they head back to feeding grounds after breeding in Gabon, although the Numbers adopting each strategy varied each year.
我们所能得到的结果是他们在加蓬反之后返回觅食区的路径有三条，尽管他们的数量逐年发生改变。
'What we've shown is that there are three clear migration routes as they head back to feeding grounds after breeding in Gabon, although the Numbers adopting each strategy varied each year.
我们所能得到的结果是他们在加蓬反之后返回觅食区的路径有三条，尽管他们的数量逐年发生改变。
When Algernon turns left, he first goes forward a bit so that his back is clear of the wall ending to his left.
当algernon向左转时，它先向前走一点儿，让它的背部超过左边通道的墙。
Be clear in your cover letter that you are relocating to that city,?said De Back.
是否在你求职信中明确的提到你愿意为了工作换到另外的城市呢？
We saw patients twice a day, but it became clear that we could come back days later and the device would still be charged.
我们一天去看望病人两次，但是很明显我们也可以几天后再回去看他们，那时候设备还将会是充满电的。
Nature abhors a vacuum, so if you clear space without filling it back up with something worthwhile, new distractions will creep in.
自然界没有真空，所以如果你在清理空间时不在原处放进什么有价值的东西，新的干扰物就会潜入。
There were no clear signs of biological activity, and the pictures Viking beamed back showed a bleak, frozen desert world, backing up that grim assessment.
其中没有明显的生命活动迹象，海盗飞船传回来的图片里显示的是一片阴冷的冰封漠海，更是佐证了那个严酷的事实。
You have to go quite a long way past that point to bring back the clear-water ecosystem.
你必须经历一个非常漫长的过程才能通过那个能恢复到清水状态的生态系统的临界点。
The message is clear. If Washington scales back its support for Pakistan, there is more than one game in town.
这当中传达的信息非常明显：如果美国减少对巴基斯坦的支持, 巴基斯坦还可以留有一手.
They just power down, metabolically speaking, and then wait until the coast is clear (of antibiotics) to come back to life. Which is why the poor patient just can't seem to clear the infection.
从新陈代谢的角度讲，它们仅仅是处于一种休眠状态，等抗生素的威胁过后重新开始活跃，这也是受感染的病人久久无法痊愈的原因。
Thousands of aftershocks have set back efforts to clear roads to quake-hit areas.
清理通往灾区道路的工作也因为数千次余震而受到影响。
This reaffirmed what has become clear recently: that the epidemic is being beaten back by the widespread deployment of drugs, in combination with changes in the behaviour of those most at risk.
这份评估再次重申了近期发生的一些明显的变化：那就是通过药物的配置普遍广泛，以及在那些具有较高危险的行为上所做出的改变，使得艾滋病正在一步步被击退。 其中。
This reaffirmed what has become clear recently: that the epidemic is being beaten back by the widespread deployment of drugs, in combination with changes in the behaviour of those most at risk.
这份评估再次重申了近期发生的一些明显的变化：那就是通过药物的配置普遍广泛，以及在那些具有较高危险的行为上所做出的改变，使得艾滋病正在一步步被击退。 其中。
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