The W.H.O.has an influenza warning system in which phase six means that a pandemic is taking place.

VOA: special.2009.06.10

You've got to place the boundary at exactly the right place, otherwise you've got a bit too much in your system or a bit too little.

你要把边界,设置在正确的位置上，否则你的系统就会要么多出一部分,要么少一部分。

麻省理工公开课 - 热力学与动力学课程节选

I want to start out by mentioning taxes and welfare because, I think, that it's really the most important risk management system already in place.

我想从,税收和福利开始讲起，是因为，我认为，它们实际上是现行的最重要的,风险管理机制。

耶鲁公开课 - 金融市场课程节选

Secretary Gates said the new plan will allow flexibility and put in place a defense system more quickly than the previous proposal.

VOA: standard.2009.09.17

"This is about trying to tackle an exceptional economic crisis, far beyond the financial system and set in place measures, measures that really do make a difference,".

VOA: standard.2009.03.29

His latest statement focused on the need to correct flaws in the aviation security system that allowed the would-be bomber to board the Detroit-bound flight in the first place.

VOA: standard.2009.12.29

"That will put in place stronger, global standards across the system that provide the right balance between stability, preserving the capacity for innovation, make sure we reduce the risk of future crises."

VOA: standard.2010.05.26

But it is becoming clear that the system that has been in place for years now, is not sufficiently up-to-date to take full advantage of the information we collect and the knowledge we have,".

VOA: standard.2009.12.29

"because the virus can spread rapidly, but what we're seeing so far is a pretty stable position as far as the virus is concerned, it's producing relatively mild illness in most people, but in a small proportion it's causing serious problems and we have in place the plans in our health care system to deal with those problems,".

VOA: standard.2009.07.31