稀土金属、钇、钪及其混合物的无机或有机化合物。

Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium or of mixtures of these metals.

youdao

稀土金属、钇、钪及其混合物的无机或有机化合物。

Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium or of mixtures of these metals.

youdao