classes of metals造句

例句与造句

1. "' Refractory metals "'are a class of metals that are extraordinarily resistant to heat and wear.
2. He discovered nickel carbonyl, a previously unknown compound and the first-discovered in the class of metal carbonyls, which could be easily Clydach, near Swansea, Wales for final purification.
3. While Folkman was developing that theory, other scientists were finding that in a wide range of cancer types, cells were producing a booming supply of a certain class of metal-binding enzymes that are usually fairly scarce.
4. It's difficult to find classes of metals in a sentence. 用classes of metals造句挺难的