Dinitration
二硝化作用
??? 情景例句
to meet the rest of the troop at two o'clock at the museum.
我們得在兩點鐘到博物館與其他童子軍會合。
She is supposed to be one of the best singers.
大家認為她是最有名氣的歌星。
You're welcome.
不用謝。