healthy food is good for your health.we should eat healthy food.healthy food, including vegetables, fruits, fish, meat, and so on. but we should keep a adequate diet,and we cannot not eat certain foods too much.

we know that some of our students do not like eating lunch at school because the food is not delicious. so they often go out of school to buy something they like to eat. but i am afraid it is bad for their health to eat lunch outside because some of the food they buy isn’t healthy enough.

翻譯：

健康的食物對身體健康有益。我們應該吃些有益於健康的食物。健康的食物包括蔬菜，水果，魚類，肉類等等。但是我們需要合理飲食，對於某種食物不能過量飲用。

我們知道許多學生不喜歡吃學校的午飯，因為它不美味。所以經常去校外買些喜歡吃的東西。但是我恐怕他們買的這些校外的食物對身體有害，不夠健康。