Many students could hardly stay awake in his class without first drinking a cup of coffee.
如果不先喝杯咖啡，许多学生在他的课上几乎无法保持清醒。
Well, many students could hardly stay awake in his class without first drinking a cup of coffee.
在他的课上，许多学生如果不先喝一杯咖啡，就很难保持清醒。
When all the students had a cup of coffee in their hands, the teacher said, "If you noticed, all the nice looking and expensive cups had been taken, but the simple and cheap ones had been left behind.
当所有的学生手里都拿着咖啡杯时，老师说：“如果你们有留意到，就会发现所有好看的和贵的杯子都被拿走了，而简单的和便宜的杯子都被留下了。”
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