Permeometer
织物透气性测试仪
🗣️ 情景例句
Do you want to do something this Sunday? John and I would like you to come over for a party.
你星期日要不要做什么事？约翰和我想请你过来参加宴会。
Which country do you come from?
你从哪一个国家来？
No one knows how long it will last.
谁也不知道会持续多久。