Firefighters say they are making progress, but they warn that it might not be contained for another two week.

VOA: standard.2009.09.01

They warn us of dangerous trends. They point out potent evils.

他们为我们警告对危险倾向，指出潜在的邪恶。

耶鲁公开课 - 1945年后的美国小说课程节选

They warn that the amount of junk in Earth's orbit is increasing and, as it does,the risks to satellites and space vehicles,also rise.

VOA: standard.2010.07.24

Other products warn drivers if they are falling asleep or in danger of an accident.

VOA: special.2010.01.08

They observe the movement of lions and warn herders of their presence.

VOA: special.2009.05.05

Some warn the measures could trigger a trade war. Others say they represent more normal trade relations.

VOA: standard.2009.11.10

They also warn that terrorists who cannot be convicted might be set free in the U.S.

VOA: standard.2009.05.20

However,both organizations also warn patients to make sure they choose certified doctors and surgeons at health care institutions that have met high standards of accreditation.

VOA: standard.2010.04.08

They also warn that these countries are among the most vulnerable to climate change.

VOA: standard.2009.11.27