1.In three years, I will have paid off the difference with this, and I don't have to be the person who's always on call to milk.
pay off 付清;取得成功;贿赂;报复
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。
It has been rather costly to install the machinery, but it should pay off in the long run.
安装这套机械代价很高,但从长远来看它会赚钱的。













