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
Well, Grandpa will be disappointed, too.
爷爷也会感到失望。
How do you spend your evenings?
夜生活你都是怎么过的？
I'll just play it by ear.
我到时随机应变。