当时，我在一个小型制造车间打工，任务是从早到晚地翻转车床上的金属杆。

The job was in a small engineering workshop. My task was to turn metal rods on a lathe all day.

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研究表明当时40 \ %的金属加工是在车床上完成的。

Studies show that 40 percent of all metal cutting operations were performed on lathes at that time.

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他用车床车一块金属。每车一圈，就有一圈被车的部分金属变成一圈废料。

He turned a piece of metal with a Turner. At each turn, a part of the metal turned turned into scrap.

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