Pentavalency
五价
🗣️ 情景例句
Everything will come out right in the end---just you wait and see.
你就等着瞧吧，一切最终都会顺利解决。
We never know the worth (or value) of water till the well is dry.
井枯方知水可贵。
Are your grandparents still living?
你的祖父母还在么？