给支票背书 endorse a check
A：Why does the bank ask customers to endorse checks?
银行为什么要求客户给支票背书呢？
B：The bank asks the clients to sign his or her name on the back of the check to show that it's correct.
银行要求客户在支票背面签名是要证明支票上的内容是正确的。
endorse /?n?d??s/ v.（在票据等背面）签名，背书
customer /?k?st?m?(r)/ n. 顾客，客户
client /?kla??nt/ n. 客户
兑现支票 cash a check