Dianion
二价阴离子
🗣️ 情景例句
He is not up to the job.
他不能胜任这个工作。
A good wife makes a good husband.
有好妻子就有好丈夫。
You'd better stay in bed till tomorrow. If you're not better by then, I'll take you to see the doctor.
你最好是在床上躺着，一直到明天。如果还不好，我再带你去看医生。