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开槽器, 压槽器
🗣️ 情景例句
Are you being waited on?
您需要服务吗？
Do we have to wear the helmets?
我们得戴上防护帽吗？
We offered them food and spoke to them kindly, but they remained motionless.
我们给他们东西吃，客客气气地同他们交谈，但他们却一动也不动。