Anthraconite
黑方解石, 沥青灰岩
🗣️ 情景例句
Hi, gang. Hi, everybody.
嗨 ，各位。
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？
Let's think carefully, I replied.
“让我们仔细想一想，”我答道。