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
I'm glad you like it.
我很高兴你们喜欢。
I feel guilty because I haven't written her lately.
因为我最近没给她写信，我感觉到有罪。
She likes Mike a lot, but she doesn't want to get married so early.
她喜欢迈克，但她不想那么早就结婚。