Mendelyeevite
(=mendeleevite)鈣鈮鈦鈾礦
??? 情景例句
Something really nice.
要很好的。
I missed my train.
我未趕上火車
That's a problem we Chinese must pay special attention to.
這是我們中國(guó)人必須特別注意的問(wèn)題。