Umer
abbr. unit mass emission rates 单位质量发射率
🗣️ 情景例句
What does that mean in plain English?
你能不能用大白话解释一下？
One never loses by doing a good turn.
行善者决无一失。
She stood three feet high and her hands rested on her hips.
她身高3英尺，双手叉腰。