7. function n. & vi. 功能，作用，起作用

6. mineral n. 矿物

5. product n. 产品

4. diet n. 日常饮食

3. fuel n. 燃料，营养物

2. energy n. 精力，能量

1．examine vt. 检查

7. There seems to be no other choice.

　　 ☆重点词汇☆

6. Some food does have nutrients.

5. Not all of them are bad for us.