They say the technology for making flutes out of ivory is much more complex than for making one out of bone.

VOA: special.2009.08.18

The puppeteers train for many years to move as one in bringing the puppet to life to act in complex theater productions.

VOA: special.2009.09.23

Doctor Carson is also known for performing other complex operations on children, including one called a hemispherectomy.

VOA: special.2009.09.04

Transportation planning expert Alan Clark says traffic congestion is a complex problem whose solution calls for a comprehensive approach.

VOA: standard.2010.07.26

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

And he is praising four committees in Congress for agreeing on what he calls "a difficult and complex challenge."

VOA: standard.2009.08.08

The Kaesong complex is an experiment in North-South cooperation which opened for business in 2004 just inside North Korea's border with the South.

VOA: standard.2009.06.05

Secretary Geithner told the House Financial Services Committee Thursday that it has become clear there is a need for better and tougher regulation in a complex and flawed financial system.

VOA: standard.2009.03.26

The action means the Yongbyon reactor complex, where the plutonium for North Korea's presumed small arsenal of nuclear weapons was produced, will be without international monitoring for the first time in nearly two years.

VOA: standard.2009.04.15