pay up 和pay off有什么区别？

pay off,
付清工资；债务
a. to pay (someone) everything that is due that person, esp. to do so and discharge from one's employ.
b. to pay (a debt) in full.
c. Informal. to bribe.
d. to retaliate upon or punish.
e. Nautical. to fall off to leeward.
f. to result in success or failure: The risk paid off
pay up,
全部付清；按要求支付
a. to pay fully.
b. to pay on demand: The gangsters used threats of violence to force the shopkeepers to pay up.

建议楼主多看英文释义。这样最接近原意。
Good luck

pay up全部付清

[口语]1) 偿付(索据)；付清(钱)；全部(或按时)付清(欠款)：例句: I had to ask him several times for my money, and he paid up in the end.
我不得不向他讨了几回账，他最后终于还清债了。2) 在压力下或经要求后付款，(在勒索或压力下)拿出钱来：例句: The gangsters used threats of violence to force the shopkeepers to pay up.
歹徒们以暴力相威胁，强迫店主把钱拿出来。

pay off偿清(欠款等),贿赂

1. 偿清(债务等)；付清(工资)：例句: He paid off the debt of his friend with the money raised by his writings.
他用稿费的收入偿清了朋友的债务。2. 发