为了保持健康,我们最好一周运动至少三次.
To keep healthy, we had better exercise three times a week.
The weather report says there will be a strong wind today.Be sure to all the windows.
I fell in love the Science Museum of Jilin Province the first time I visited it.
The traffic was so heavy this morning that I was nearly for school.
There's no doubt that is the coldest season of the year in China.
It's a waste to cut lots of trees for chopsticks every year.