金属呈游离态的很少。

Few metals occur free.

铝在自然界从不以游离态存在。

Never is aluminum found free in nature .

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.

在返回到服务器端时还能合并起来，这样就能把合并后的实例当作游离态实体加以重用。

They can also be merged when back on the server, so the merged instance can be reused as a classical detached entity.

甾醇是环戊烷全氢匪为骨架的一种物质，在自然界中以游离态和结合形式存在。

Sterol is a kind of substance of full cyclopentane hydrogen skeleton, and exists in the nature in free form and binding form.