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
Your dad is quite a guy.
你爸爸真不赖。
He has a cup.
他有一只杯子。
She suddenly got into a panic and stopped her car.
她一惊之下突然把车停了下来。