Danks
煤页岩, 黑色碳质页岩
🗣️ 情景例句
The rules ought to be observed.
这些规则就予以遵守。
It is hard to please all parties.
取悦各方，谈何容易。
Jim looks at Li Lei's apples. Oh! he says.
吉姆看看李垒的苹果。“噢！”他说