But he says understanding these differences can help discover how some complex processes on our own planet really work.

VOA: special.2009.12.30

Every risk management device relies on a design and the design is usually complex and has-- it all has to work together.

每种风险管理工具都是基于某种设计,而这种设计通常都是很复杂的,需要各部分相互之间的配合

耶鲁公开课 - 金融市场课程节选

But Professor Rosen says the process is complex and may not work.

VOA: special.2009.06.09

The complex documents and mathematical work were no longer necessary.

VOA: special.2010.07.14

The space station complex will serve as observatory, laboratory and workshop for astronauts and cosmonauts who live and work there.

VOA: standard.2009.11.30