yttrium compound造句

例句与造句

1. Exposure to yttrium compounds in humans may cause lung disease.
2. Yttrium has no known biological role, and exposure to yttrium compounds can cause lung disease in humans.
3. It is the most important yttrium compound and is widely used to make Eu : YVO 4 and Eu : Y 2 O 3 phosphors that give the red color in color TV picture tubes.
4. It's difficult to find yttrium compound in a sentence. 用yttrium compound造句挺难的