potato的复数是什么

　　例句：

　　Potatoes are still the most popular food, followed by white bread.

　　马铃薯仍然是最受欢迎的食物，其次是白面包。

　　Top the steaming hot potatoes with a knob of butter.

　　在冒热气的马铃薯上放一小块黄油。

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

　　像这样的'话题是报纸赖以生存的素材。

　　Serve the lamb with new potatoes and green beans.

　　羊肉配新鲜土豆和青刀豆一起上。