staple是可數名詞還是不可數名詞

staple可以作名詞和動詞。但作名詞時該詞是可數名詞。

（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

麵粉和大米等主食

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

例如：Bananas and sugar are the stables of Jamaica.

香蕉和糖是牙買加的主要產品。