稀土有两种，一种是重稀土，一种是轻稀土。

Rare earth consists of two categories: one is heavy rare earth, the other one is light rare earth.

youdao

稀土有两种，一种是重稀土，一种是轻稀土。

Rare earth consists of two categories: one is heavy rare earth, the other one is light rare earth.

youdao