Maceral
煤中矿物组分的细微组织, 煤素质
🗣️ 情景例句
Tell me about your educational background.
告诉我你的学习背景。
The milkman hopes the cows have plenty of milk every morning.
挤牛奶的人希望每天清晨都能得到大量牛奶。
How are you getting to the airport? Is anybody seeing you off?
你打算怎样去机场？有人送你吗？