Understable
欠稳定的
🗣️ 情景例句
Grandpa, when did Dad graduate from Michigan?
爷爷，爸爸是什么时候从Michigan毕业的？
I changed my mind.
我改变主意了。
By the end of next year, they will have finished work on the new stadium.
到明年年底，他们将把新体育场建成。