Danks
煤页岩, 黑色碳质页岩
🗣️ 情景例句
No, I think this one belongs in the people-at-work section.
不 ，我认为它属于工作中的人们的那一区。
It is better to be safe than sorry.
事后追悔不如事前稳妥。
Hi! Nice to meet you, Ling Feng!
很高兴见到你，。