Hydroxyfluoride
羥基氟化物
??? 情景例句
He's a lucky boy.
他是個幸運(yùn)的孩子。
According to Mr. Green,this is a complicated problem.
對于格林先生，這是一個復(fù)雜的問題。
He has been sick for three weeks.
他已經(jīng)病了幾周了。