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"For most solar cell materials, it's defects on the surface of the material that cause a reduction in performance, but with these oxide materials, it's the other way round: the surface is largely fine, but something about the bulk leads to losses," said Professor Sam Stranks, who led the research.

"Chinese leaders may use the people's nationalist sentiments to justify their policy decisions and pressure other countries, but it doesn't work the other way round - the leader won't be pressured by public sentiment into acting rashly," a policy insider told Reuters on condition of anonymity.

“Just the other way round, the decisions we make must help spur growth and technological development of the Russian economy.”

One answer is that he wanted to pretend that he had worked from the phenomena to a theory, and not the other way round: the Royal Society admired Bacon, and this would have been the Baconian way to proceed.

Asked about whether Barr had proposed to Mexico dropping the charges, rather than the other way round, the Department of Justice spokeswoman said she could not comment on contacts with foreign governments regarding investigative matters.