to give the total amount that is owed or asked for.
Some ballplayers charge fans $50 for autographs, and the fans pay up.
He would surely have paid up if she had asked him for the money.
英语词组固定搭配大全包含18674条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。