Since the average maturity of the Fed's bond holdings is five to ten years, the Fed will have to find a way to mop up, or "sterilise", the related bank reserves for a long time.

联储持有债券的平均到期日是五到十年，联储必须想办法在长时间内抹除，或者“清理”相关银行储备。

youdao

If you let your harvesters continue to harvest, they will only mop up the small baby crystals, and not give them enough time to grow into more valuable crystals.

如果让你的矿车继续开采，它们只会不断的吃光小的幼矿，而没有时间让它们长成更有价值的晶体。

youdao

The mop-up, time and the environment's resilience have restored the sound to its former glory--superficially, at least.

FORBES: Good as New, Almost

If the Fed truly wants to tighten, there's an easy, time-tested way to do it: sell bonds from its portfolio to mop up the excess money it's mistakenly spilled onto the financial markets for the past 18 months.

FORBES: Fact and Comment