英语翻译1.必须多种树,因为保护环境很重要.2.坐飞机去北京比坐火车去更省时间.3.他的朋友们经常叫他戒烟4.当孩子们看

We must plant more trees,becaus the environment protection is very important
It takes less time to go by plane than by train to Beijing
His friends often call him to give up smoking
When the children see their favorite star, they are too excited to clapp and scream
The factory used to pour the waste into the river.