Literary creation of this period has also revealed group variation, which is incarnated in the choice and judgment of the writer's creative subjects and the artistic style.

这时期的文学创作也呈现出强烈的群体变异特征，它既体现在作家创作题材的选择和评判上，也体现在艺术审美风格方面。

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It too sounds a fine idea, but even top private schools, with lots of money and good teachers, find it tricky to timetable lots of variation within one age-group's lessons.

ECONOMIST: Exams

But, by coincidence, he then discovered a group of scientists working on a mouse called Peromyscus that possesses the same less active variation of the MC1R gene as mammoths did.

ECONOMIST: The genetics of mammoth coat colour

There is tremendous variation in the prevalence and availability of fake drugs within and across countries, according to Kubic, whose group tracks counterfeiting incidents.

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