Moreover, it makes a comparison study from the two perspectives of efficiency and fairness.

此外，还从效率和平等两个角度进行了比较研究。

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A comparison study of some physiologic indicators of rice received common urea or polymer coated urea was conducted by using pot and field microplot experiments.

采用盆栽试验和田间微区试验，对施用覆膜尿素和普通尿素的水稻生理指标进行测定。

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One problem: The Erbitux trial lacks a control group or a comparison to conventional chemotherapy, so the study does not show clear survival benefit.

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The study does not allow a direct comparison of men and women's stress coping mechanisms, because only men were included.

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Davies and Molloy are therefore properly cautious with their conclusions, but nonetheless note that a comparison of the beginning and endpoints for their study, which minimizes the La Nina contribution, still showed a decline in cloud height.

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