One argument which is often raised is that if a professor tries his hand at a new topic, he will be unable to train new Ph. D. s in this new area, thus limiting our ability to produce more Ph.

其中一个经常拿出来说事的论点是：如果教授腾出手来尝试一个新的主题，他是不能带这个新领域中的博士生的，那么我们生产博士生的能力就下降了。

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Yet there is also a darker side to drones for U. S. oil companies and one that could threaten their ability to compete in foreign markets in the future.

然而，无人机对美国的石油公司也有负面作用，可能会威胁到他们未来面对国外公司的竞争力。

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D-A-V-I-D Well, if I've got a five-letter word like D-A-V-I-D, well, that's like five bytes and yet we only have the ability thus far in this class to return one thing at a time I can't return five bytes to you, but wait a minute, those bytes by nature of a computer are just stored in RAM.

好的，如果有5个字母的单词，如，那是5个字节,我们只能返回一个东西,而不能返回5个字节，等一下，这些字节被计算机本能地,存储在内存中。

哈佛公开课 - 计算机科学课程节选

And if there's one quality I desire in a president, it's the ability to speak in a grating tone at a high volume.

CNN: All-in-One Debate Blog: Round 3

In the last two weeks the strength of England's assault has been in their ability to have every one of their players contributing with match-winning performances.

BBC: Ashes: Justin Langer's column from Adelaide

One of the most eye-catching parts of Burgess's game is his ability to put in big hits - and on Saturday, one of the recipients could be older brother Luke, who plays for Leeds.

BBC: Burgess looks to build on success