翻译（中译英）课堂上，老师在辛勤讲解，可是有的同学在偷看闲书，有的在窃窃私语，有的干脆睡着了。课堂上，老师在辛勤讲解，可是有的同学在偷看闲书，有的在窃窃私语，有的干脆睡着了。

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The teacher was in hard to explain, but some students peek light readings, and some whispered, some even simply fell asleep.
Teacher carefully explained, but some students peek light readings,some whispered, and some simply fell asleep in class.
Class, the teacher is hard to explain, but some students at xianshu, some in a whisper, some simply fell asleep.
In the class,the teacher taught the students heart and soul!but some students were reading the book have nothing to do with the class,some were speaking with each other ,some were sleeping ......