Triad prototropy
[化] 三原子互變體系
?? 詞語組成解析
triad
['trai?d]
n. 三個一組;三幅一組;三和音;
質子移變(作用)
??? 情景例句
How was it?
怎么樣？
It's December.
現在是十二月。
I saw him playing football on the playground.
我看見他在操場上踢足球。