Permeometer
织物透气性测试仪
🗣️ 情景例句
what do you think this big surprise is?
你认为这一件大惊喜会是什么？
He hasn't answered my letter yet.
他还没有给我回信。
Before he retired, Frank was the head of a very large business company, but as a boy he used to work in a small shop.
在退休前，弗兰克是一家非常大的商业公司的经理，但他小时候却在一家小铺里做工。