Contravariant
反［抗, 逆］变式, 抗［逆］变量
🗣️ 情景例句
You are better off waiting'till you get married before doing anything stupid.
你如果想做傻事的话，最好等到结婚后。
How can I get in touch with you?
我怎样能跟你联络上？
The apparatus thus described, however,
然而，这里所说的仪器