staple是可數(shù)名詞還是不可數(shù)名詞

staple可以作名詞和動(dòng)詞。但作名詞時(shí)該詞是可數(shù)名詞。

（1）a small piece of thin wire that is pushed into sheets of paper and bent over to hold them together訂書釘

（2）a small U-shaped piece of metal with pointed ends, used to hold something in place U型釘

（3）a food that is needed and used all the time基本食物，主食

例如：staples like flour and rice

面粉和大米等主食

（4）the main product that is produced in a country一國的主要產(chǎn)品

例如：Bananas and sugar are the stables of Jamaica.

香蕉和糖是牙買加的主要產(chǎn)品。