metals例句

Lead was one of the metals known to the ancient world.
铅是早在古代就已知的金属之一。

Metals expand when they are heated.
金属受热会膨胀。

What spurred them on was alchemy, the'science " of changing ordinary metals into gold.
激励他们的是炼金术, 即把普通金属变为金子的 “ 科学 ”.

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