Vacuum test(ing)
[化] 真空试验
🧩 词语组成解析
🗣️ 情景例句
May I bring you a salad?
要不要来点沙拉呢？
We can't recall how often he's written.
我们记不起来他每隔多久写一封信。
The bison skins were sent by rail to cities to be sold.
野牛皮用火车运到城里出售。