Subinvariant
次不变的
🗣️ 情景例句
All right. We'll make close study about it and give you reply as soon as possible.
很好。对这个问题我们将仔细研究一下，尽快给你们答复。
You don't have to pay any duty on personal belongings.
你不必在个人财产上付任何税。
Dear Ling Feng,
亲爱的Ling Feng：