The subject selection, scheme preparation, theoretical analysis, experiment and development, appraisal of achievements in scientific research, are all based on scientific and technical literature.

从科学研究的选题、制定方案、理论分析、实验研制到成果鉴定等各个阶段，无不以科技文献为依据。

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Problem is the start point of scientific research work, and subject selection is the first step of the whole scientific research procedures.

问题是科学研究的起点，选题是科学研究全过程的第一步。

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Its subject selection, design, experiment content and method achieve the purpose, and have certain applicable value to liver cancer therapy.

本课题的选题、设计、实验内容、方法达到了课题设计目的，对治疗肝癌具有一定应用价值。

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Rather than a traditional trial setup, his patients pay tens of thousands of dollars for the privilege of participating in the studies (not the most ethical or effective subject selection strategy).

FORBES: A Film Producer, A Cancer Doctor, And Their Critics

The explanations, particularly in the thorny field of quantum physics, are excellent, and the selection of subject matter skilfully winnows a vast field.

ECONOMIST: History of science: Time's arrow | The

What they have found is that about 1, 800 protein-coding genes, some 7% of the total known, show signs of having been subject to recent natural selection.

ECONOMIST: Human evolution