Maceral
煤中矿物组分的细微组织, 煤素质
🗣️ 情景例句
Have you got time this morning
今天上午你有时间
When you go to buy, use your eyes not your ears.
你去购买东西时，要用眼睛莫用耳。
I don't know. Let's go for a walk.
我不知道。咱们去散散步吧。