如果火星上的黄钾铁矾也是在微生物的帮助下形成的，我们就有可能在所找到的样品中发现它们的残留物。

It's possible that if the jarosite on Mars was also formed with the help of microorganisms, we might be able to detect remnants of them in the samples we find.

youdao

从开着的窗子望进去，我看到同学们已端坐在自己的座位上，老师手里拿着一本书，胳膊下夹着铁戒尺，在教室里走过来走过去。

Through the open window I saw my schoolmates already in their places. The master was walking up and down the room with the iron ruler under his arm and a book in his hand.

youdao

他疾速攀下铁梯，停在梯子最后—级上，离他脚下飞速掠过的铁路路基有两英尺。

Climbing quickly down a steel ladder, he paused at the bottom, two feet above the roadbed flashing by.

youdao