What is a cash register?

我想xuguitang是想要我们用更简化的方式来解释cash register？！

你去过超市吗?结帐那里,服务员敲一下回车,那个装钱的盒子就蹦出来,那个盒子就是CASH REGISTER.收银机！

a cashbox with an adding machine to register transactions; used in shops to add up the bill
wordnet.princeton.edu/perl/webwn

A cash register is a mechanical or electronic device for calculating and recording sales transactions, and an attached cash drawer for storing currency. Usually the cash register also prints a receipt for the customer.

cash register
n.
<美>收银机, 现金出纳机