Umer
abbr. unit mass emission rates 单位质量发射率
🗣️ 情景例句
Some Japanese words are of Chinese origin.
有些日本文字是起源于中文的。
I swear I'll never tell anyone.
我发誓不告诉任何人。
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。