Anthracography
煤相学
🗣️ 情景例句
Thank you for your reassurance, Dr. Stewart.
谢谢你消除了我疑虑，Stewart大夫。
I leave the house at eight a.m. each day.
我每天在上午8点离开房子。
Are you going to ship this by air?
这批货你要用空运的吗？