例句：
They are at the end of their food supply.
他們的食物儲備已消耗殆盡。
Within three days they had exhausted their supply of food.
他們在三天之內就把所有糧食吃光了。
His company offers a flexible packaging service for the food industry.
他的公司為食品工業(yè)提供靈活的`包裝服務。
It seems such a waste to throw good food away.
把好的食物扔掉似乎太浪費了。英語可數名詞一般指普通名詞中人或物的個體，能與不定冠詞a，an連用并且能夠計數的名詞，以及部分人或物的總稱，不可數名詞通常是指不能夠計數的人或物。