1、付清
... trading profits 营业好处 to pay off 付清 arrant 仓单 ...
2、偿还
... to pay attention to：注意 to pay off：偿还；没有白费 to pay the price：付出代价 ...
3、没有白费
... to pay attention to：注意 to pay off：偿还；没有白费 to pay the price：付出代价 ...
4、偿清
... to raise money 筹集资金 to pay off 偿清 debt collectors 收债人 ...