Quadricovalent
四配价的
🗣️ 情景例句
Do you have a room with a view?
你们有可欣赏到风景的房间吗？
I'll see what I have. What do you need it for?
我来看看我有什么样的零钱。你要干嘛？
So archaeologists have neither history nor legends to help them to find out where the first 'modern men' came from.
于是，考古学家们既缺乏历史记载，又无口头传说来帮助他们弄清最早的“现代人”是从哪里来的。