3D printers are already used to make life-size models of car parts, and man-made body parts, such as ears.

3D 打印机已经被用来制作实物大小的汽车零件模型和人造身体部位，例如耳朵。

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They're already used in dozens of countries worldwide.

它们已经在全球许多国家得到使用。

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Long before the use of machinery and fertilizers, industrious and creative farmers had already used different kinds of methods to increase crop yields.

早在使用机械和化肥之前，勤劳和富有创造性的中国农民就已经采用各种各样的方法来增加农作物产量。

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Nyguen says he has already used his savings to pay fishermen who can't fish and now he is contemplating working for BP - the first time he will work for anyone but himself.

VOA: standard.2010.05.15

So, in all of this, what he does is he makes, to use an expression that I've already used before in the context of absolutism, he makes the Boyars, while he's building his navy and expanding Russia, he makes the Boyar junior partners in absolutism.

所以,通过所有的这些事情,用我之前用过的一个词来形容,他使得波维尔们,当他在建海军和扩张领土时,他使得波维尔贵族臣服在他的绝对权威之下

耶鲁公开课 - 欧洲文明课程节选

So essentially, we have two ethene or ethylene molecules here to start with where these blue are our 2 s p 2 hybrid orbitals, so you can see that for each carbon atom, one is already used up binding to another carbon atom.

本质上，我们从两个乙烯分子开始,蓝色的是2sp2杂化轨道，你可以看到，对于每一个碳原子，其中一个已经用来和另外一个碳原子成键。

麻省理工公开课 - 化学原理课程节选

The non-oxynol nine gel, was based on one already used in condoms as a spermicide.

BBC: Seaweed gel could protect against HIV

Starting in 2013 hospitals are upgrading to ICD-10, a standard already used in Europe.

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Have you already used Prezi to make your presentations stand out from the crowd?

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