potatos可數還是不可數

　　Issues like this are the newspaper's meat and potatoes.

　　像這樣的話題是報紙賴以生存的素材。

　　The potatoes cropped well this year.

　　今年馬鈴薯豐收。

　　The potatoes were sold loose, not in bags.

　　土豆是散裝而不是袋裝出售。

　　She put some potatoes on to boil.

　　她煮了些土豆。

　　The potatoes are planted by machine.

　　這些土豆是用機器種植的。