Backing vacuum
[化] 前级真空
🧩 词语组成解析
backing
[['bækiŋ]]
n. 后退, 衬背, 后援, 支持者\\n[化] 衬垫
🗣️ 情景例句
when she was a child.
在她小时候。
I only regret that I have but one life to give for my country.
我抱憾的是，只有一次生命能献给祖国。
Excuse me, please! Which is the way to the North Street Hospital?
请问，去北街医院怎么走？