Vacuum cavity
[医] 真空腔
🧩 词语组成解析
🗣️ 情景例句
That was so thoughtful of you, Michelle.
你想得真周到， Michelle
Her job is beginning to get her down.
她开始对工作感到厌倦了。
An advertisement which begins with the magic word FREE can rarely go wrong.
凡是用“免费”这个神奇的词开头的广告很少会失败的。