管理员老师您好,网页总是显示非法操作。烦请您帮我把问题贴出来,内容我随后补充上来。谢谢您。
Then somebody laughed, then the entire class was laughing, and not in contempt and ridicule, but with open-hearted enjoyment.
and连接并列分句,省略了they were laughing。
not...but...为关联并列连词,连接二个状语,否定A,肯定B。
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