Question

求各位英语达人帮一下忙，10个短语每个短语造两个句子并配有中文翻译，谢谢了。

Answer 1

I began to laugh at this crazy discovery.
我因为这个疯狂的发现而大笑。
Laugh at him behind his back with your classmates
在他背后和同学一起嘲笑他。
If you want to keep off the weight, keep up the healthy eating and exercise.
如果你岩州棚想粗则让赘肉远离你，那就保持一个迹樱健康的饮食和锻炼习惯吧。