Scientists have said it is rare for icebergs to be seen so far north.

科学工作者说，如此远的北部很少能见到冰山。

youdao

Scientists have said the first six months of 2010 were the hottest globally on record.

科学家称2010开始的6个月事全球记录上最热的。

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Nasa scientists have said they could be on the verge of a breakthrough in their efforts to forecast earthquakes.

美国宇航局科学家说他们正尽力在预测地震方面有所突破。

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Some scientists have said the government should cancel large sporting events and close schools to try to stop the spread of the respiratory disease.

VOA: standard.2009.05.30

Paul Sereno said the fossil will be returned to China and put in a museum when the scientists have finished their studies.

VOA: special.2009.10.13

One astronomer said scientists have been filling in the details ever since.

VOA: special.2009.04.29

Scientists have said such a pursuit could cost hundreds of millions of dollars at least.

WSJ: Planetary's Plan to Mine an Asteroid

However, at least two groups of scientists have said they have plans to clone a human.

CNN: U.S. lawmakers debate limits on human cloning

Radiation particles found on the beach at Dalgety Bay pose a low risk to public health, scientists have said.

BBC: Dalgety Bay radiation: Particles pose 'low risk' to public