hamburger可数吗可以用They

　　例句：

　　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。

　　The teacher ordered the hamburger meals to encourage the students.

　　为了鼓励学生，老师点了汉堡餐。