At least two hundred fifty of them are known to be harmful.

VOA: special.2010.03.09

So these devices, when I was a youngster, were colloquially known as "atom smashers", because they have the capacity to actually break these and have them reform.

这些设备，当我还年轻的时候，它们在口语中被叫做核粒子加速器，因为它们有能力,将这些破碎并重新形成。

麻省理工公开课 - 固态化学导论课程节选

There are stories of deaf people who are within certain societies where nobody signs to them, and so they're what's known as linguistic isolates.

还有些关于生活在并无手语的,特定社会下聋人的故事,这种情况就是所谓的语言隔离

耶鲁公开课 - 心理学导论课程节选

The interrogators were told they could put them in painful standing positions, deprive them of solid food, keep them awake for extended periods of time, lock them in cold rooms, and submit them to the technique of simulated drowning known as waterboarding.

VOA: standard.2009.04.17

So, let's go back to the notes, and let's fill these in, seven electrons. Another way you could have known them was to look at Lewis' notes here, where if look at this box carefully you see there are seven dots around the cube, so there are his seven valence electrons.

那么，让我们回到讲义，把它们填进去，七个电子，还有另外一种方法可以知道这些,那就是看看路易斯的讲义这里，大家可以看到这个立方体周围有七个点,因此有七个价电子。

麻省理工公开课 - 化学原理课程节选

Gambari said that during the secretary-general's visit last month to Burma, which is also known as Myanmar, Mr.Ban met with the country's senior leadership and asked them to free Aung San Suu Kyi and other political prisoners as well as take steps to enhance the political process leading to next year's elections as a gesture of their credibility to the international community.

VOA: standard.2009.08.11