Hopeite
磷锌矿
🗣️ 情景例句
Keeping busy. Yourself?
一直很忙，你呢？
Every advantage has its disadvantage.
有利必有弊。
If we buy the smaller one, the IBM PC386, we might have to change it in a few years' time for a bigger one.
如果我们买一台较小的IBM386的话，过几年可能就得换一台较大的机子。