古天文术语，亦称“七曜”、“七纬”，其意思说法不一。
该文提出：研究运气学说中气候变化的成因，必须突破“七政”。
Therefore, to study the theory of Five Circuit Phases and Six Atmospheric Influences in the causes of climate change, we must break through the "qizhen".
七年前，威克森林大学的生物化学家崔政正在进行一个常规的试验：他给试验鼠注射一种攻击性很强的癌细胞，致死率100%。
Seven years ago, biochemist Zheng Cui of Wake Forest University was conducting a routine experiment, injecting test mice with a strain of cancer cells so aggressive it caused a 100 percent death rate.
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