Which three sieves?

哪三个筛子？

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Additionally, another 21 clinical Yellow fever suspected cases were reported, of which three died.

此外，还报告了21例临床黄热病疑似病例，有三人死亡。

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It challenges mathematicians to list the possible shapes into which three-dimensional space can be wrapped up.

数学家们需要列出三位空间中所有可能的图形方案。

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Canadian Grant Kippen is the chairman of the ECC, of which three of the five members are appointed by the U.N.Secretary General.

VOA: standard.2009.09.15

I'm going to write it like this three moles of hydrogen which is a gas one bar 100 degrees Celsius.

我会写成这样：,三摩尔氢分子，气体,1巴，100摄氏度。

麻省理工公开课 - 热力学与动力学课程节选

and then you also have the smaller, you know like, three or four-story homes which one family may occupy.

然后你也有那种小一些的，只有三四层楼的，一个家庭就可以占据的房子。

上东区的氛围 - SpeakingMax英语口语达人

There are currently 52 official sites in Devon, of which three are owned by councils.

BBC: Gypsy generic picture

In Birmingham, police were treating a hit-and-run incident in which three men died as a murder inquiry.

CNN: Following four nights of frenzy, an eerie calm in Britain

In north Wales there were 11 deliberate fires over the Easter weekend of which three were grass blazes.

BBC: Grass fire threat to overhead wires near Pontycymer