This drug has one important limitation. Its effects only last six hours.

这种药物有一个很大的限制因素，其药效只能持续6个小时。

《柯林斯英汉双解大词典》

Whatever may have been the moment and the circumstances of its appearance in the scale of animal life, language could only have been born in one fell swoop.

不论是在动物的历史中何种时候何种环境，语言只可能是一刹那间诞生。

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Stonehenge, a rock circle, is not only one of Britain's most famous historical places but also one of its greatest mysteries.

巨石阵是一个巨石圈，它不仅是英国最著名的历史遗迹，也是英国最大的谜团之一。

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After Russia recognized the independence of South Ossetia and Abkhazia from Georgia one year ago, the only country to follow its lead was Nicaragua.

VOA: standard.2009.08.26

Levi-Strauss writes: Whatever may have been the moment and the circumstances of its appearance in the scale of animal life, language could only have been born in one fell swoop.

列维，施特劳斯写道：,不论语言是何时何种环境下,在动物的历史中诞生的，语言只可能是一刹那间诞生。

耶鲁公开课 - 文学理论导论课程节选

It's at this moment that the poem reaches a remarkable climax, and I have to say that this is actually only one of the poem's remarkable climaxes. This poem has amazing ebbs and flows throughout its entirety, but without question this is one of the most intense personal moments in the elegy.

这个时候这首诗达到了非凡的高潮，这其实只是这首诗的众多高潮,之一，这首诗从头到尾都充满起伏,但毫无疑问,这是这首悼亡诗里最私人的几处之一。

耶鲁公开课 - 弥尔顿课程节选

The free software is already the second most popular way for people to view the Internet, with more than 106 million copies downloaded since its introduction only one year ago.

FORBES: Magazine Article

Sadly, this exclusive to the HDHomeRun Prime because its the only one with the hardware to support DLNA, but the new tuners due this spring will allow DLNA access of ATSC, QAM and DVB sources -- as well as allow playback on Media Players that only support h.264.

ENGADGET

The duke also visited the centre's surf machine, thought to be the only one of its kind in the UK and one of only 50 worldwide.

BBC: NEWS | UK | Wales | South West Wales | Philip's belly-dancing 'insult'