Umer
abbr. unit mass emission rates 单位质量发射率
🗣️ 情景例句
Marilyn Stewart, this is Harry Bennett.
Marilyn Stewart，这是Harry Bennett。
The doctor advised me to get plenty of exercise.
医生劝我要多运动。
On his way to the sweet shop, he dropped his fifty pence and it bounced along the pavement and then disappeared down a drain.
在他去糖果店的路上，50便士掉在地上，在人行道上跳了几下，掉进了阴沟里。