汉堡是可数名词吗

　　This is your order, a hamburger and an apple pie.

　　这是您点的`餐，一个汉堡和一个苹果派。

　　I'd like to order a hamburger and an orange juice.

　　我想点一个汉堡包和一杯橙汁。

　　Seymour now celebrates the invention of the hamburger every year.

　　西摩现在每年都要庆祝汉堡的发明。