铝在自然界从不以游离态存在。

Never is aluminum found free in nature .

youdao

金属呈游离态的很少。

Few metals occur free.

youdao

铅在自然界中很少呈游离态，主要存在硫化物和方铅矿中。

Lead is rarely found free in nature; its major ore is the sulfide galena.

youdao

铅在自然界中很少呈游离态，主要存在硫化物和方铅矿中。

Lead is rarely found free in nature; its major ore is the sulfide galena.

youdao