Efforescence
渗斑; 泛碱
🗣️ 情景例句
I don't have time to take any elective classes.
我没有时间去上任何选修课。
Sleep well.
祝您睡好。
Sorry, I haven't. Why don't you ask Jim.
对不起，我没见。你为什么不去问问吉姆呢？