Vacuum cavity
[医] 真空腔
🧩 词语组成解析
🗣️ 情景例句
Is this your very first advanced aerobics class?
这是你第一次上有氧运动高级班吗？
I've never read a more thrilling story.
我没有读过比这更令人战粟的故事。
I want some envelopes,please.
请给我拿几个信封。