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初中 Junior Highn. 聊天热线；青少年热线交谈服务
🗣️ 情景例句
Alexandra's a high-school exchange student from Greece.
Alexandra是从希腊来的交换高中生。
I don't know what you're thinking!
真不知道你是怎么想的！
since ground stations and satellites cannot see everywhere.
因为地面工作站和卫星不可能看到地球上的每一个地方。