Carbohumin
[地质]碳胡敏素
🗣️ 情景例句
You've been a very helpful.
你帮了大忙。
I enjoyed meeting and talking to you, and sharing the time together.
见到了你们大家，我们一起交谈共度时光。
I've lost my ruler. Have you seen it anywhere?
我的尺子丢了。你在哪看见了吗？