Tautomer
n. [化]互變(異構(gòu))體
??? 情景例句
when I was about eighteen years old.
那時我差不多十八歲。
Please be reasonable.
請別做無理的要求。
In Maori history,the first traveller to reach New Zealand in the year 950 was a man called Kupe.
毛利人的歷史上，于950年第一個到達(dá)新西蘭的旅行者是一個名叫庫佩的人。