mop up
US /mɑːp ʌp/
UK /mɑːp ʌp/

1.
完成, 清除
to finish a task or deal with the last parts of something
:
•
We need to mop up the remaining work before the deadline.
我们必须在截止日期前完成剩余的工作。
•
The army was sent to mop up the last pockets of resistance.
军队被派去清除最后的抵抗势力。