repay是什么意思？

There's a lot for students to complain about: the repayment threshold for paying back loans will be frozen for five years, meaning that lower-paid graduates have to start repaying their loans; and maintenance grants have been replaced by loans, meaning that students from poorer backgrounds face higher debt than those with wealthier parents.

If going to university doesn't work out, students pay very little--if any--of their tuition fees back: you only start repaying when you are earning ￡21,000 a year.