Oxybutylene
氧化丁烯
🗣️ 情景例句
I'm sorry, but I've got to be on my way.
很抱歉，我必须走了。
I ask him to tell me the truth about everything.
我要求他告诉我每件事的事实。
He collected tetters and made copies of people's diaries.
他收集到一些信件，复印了一些人的日记。