But it also has a second purpose-to keep the whole system clean.

另外它还有一个功能——保持整个系统的清洁。

youdao

Use high quality hydraulic oil is the basic of the system clean.

使用高品质液压油——高品质的液压油是系统清洁的基础。

youdao

Yogurt with live cultures keep your digestive system clean, which helps your body absorb all the nutrients from food.

富含益生菌的酸奶会清理你的消化系统，帮助你的身体吸收更多营养。

youdao

But IMF official Marek Belka says Europe also must clean up its banking system.

VOA: standard.2009.04.24

He said more needs to be done to clean up the banking system.

VOA: standard.2009.04.26

But that does not mean he has given the new system a clean bill of health.

BBC: Don't forget tomorrow's nurses

Blaming the fact that staff used Linux operating systems on their production machines for "not noticing sooner", it advised concerned users to load some up-to-date antivirus software and "make sure your system is clean".

BBC: Scareware launched from tech blog

Do I want to invest in our people, in our middle class and making it stronger, and our infrastructure and our education system and clean energy -- is that one vision or are we just going to keep on doing the same things that got us into this mess in the first place?

WHITEHOUSE: Discussing the Economy in Albuquerque