He tied a metal key and a strip of silk to the kite line.

他把一把金属钥匙和一条丝绸系在风筝线上。

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Originally they were round pieces of metal with a hole in the center, so that a piece of string could keep them together.

最初它们是圆圆的金属片，中间有一个洞，这样一根绳子就可以把它们串在一起。

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He took out a metal flask from a canvas bag.

他从帆布袋里拿出了一个金属水瓶。

《柯林斯英汉双解大词典》

A pickup is a device that captures the vibration of the metal guitar strings and changes them into electronic sound signals.

VOA: special.2009.09.27

So, you might ask then well what is the significance of shooting different amounts of photons at a metal?

所以，你们可能会问向,金属发射不同数量的光子,有什么重要性？

麻省理工公开课 - 化学原理课程节选

Mercury is a liquid metal, and mercury, the planet, is the fastest moving naked eye heavenly body. Mars, iron, why is Mars red?

水银是液态金属，水银，行星，是肉眼能看到的运动最快的天体,火星，铁，为什么火星是红色的？

麻省理工公开课 - 固态化学导论课程节选

The second idea is a device similar to a metal detector a single magnetron on a hand-held boom.

ECONOMIST: Landmines

Another used a Stylophone, a metal keyboard played with a small stylus.

NEWYORKER: Sound Machine

Without local authority funding, he paid his own way during the two-year course, taking a job as a sheet metal worker for a time.

BBC: Pete Postlethwaite fund at Bristol Old Vic School