Maceral
煤中矿物组分的细微组织, 煤素质
🗣️ 情景例句
And the telephone number is five five five…three oh nine oh. Thank you.
电话是555-3090。谢谢。
Lily is a Sophomore now.
莉莉现在大学二年级。
Hello! Is there anyone at home?
喂！家里有人吗？