food既是可数名词又是不可数名词。仅仅指”食物、食品”的时候是不可数名词。强调食物的种类时就是可数名词。例如，There are all kinds of foods on the table。

food双语例句：

Enjoy your food.用餐愉快。

It's not like you to be off your food.胃口不好，这可不像你了。

Developments in your career may give you food for thought.事业上的发展可能会引发你很多的思考。

Supplies of food and medicines are inadequate食物和药品供应不足。