Pegmatolite
[矿]正长石
🗣️ 情景例句
I'm working my way through college.
我靠勤工俭学上大学。
What time does the first train to Boston leave?
第一班去波士顿的列车什么时间开出呢？
the graphic record shows three waves arriving one after the other at short intervals.
曲线纪录就能显示出前后相间的这3种地震波。