She was sitting on the bottom step of the staircase.

她正坐在最下面一磴楼梯上。

《牛津词典》

And, sitting down, Villefort wrote the certificate at the bottom.

维尔福说着便坐了下来，在信的末端签上了字。

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This is a glass beaker after about half a million rads of radiation. The glass started to burn and crack, while the microbes sitting in the bottom just got happier and happier.

这是玻璃烧杯在约50万拉德辐射下的情形，玻璃开始燃烧，爆裂，而位于烧杯底部的微生物仍然是不亦乐乎。

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Mowbray was, however, remaining positive despite Celtic sitting bottom of Group C with just one point going into back-to-back games against Hamburg.

BBC: Mowbray frustrated by early goal

What you will find, however, is a large vent sitting right behind the display -- a trade-off for having a perfectly smooth bottom side.

ENGADGET: MSI Slidebook S20 review: MSI's flagship Windows 8 Ultrabook has a flawed design