Pentavalency
五价
🗣️ 情景例句
And I love you. Isn't that enough?
我爱你。难道这还不够吗?
No matter what the excuse, you must not be late.
不管有什么借口，你一定不要迟到。
'But I'm still having breakfast,' I said.
“但我还在吃早饭，”我说。