On the study of system evaluation approach today, each decision unit is commonly regarded as one object and selected by evaluation institution, which is not reality because of the absence of rivalry.
在现今的系统评估方法研究中，通常把每一决策单元，即被评估者看成一种客体，被动地由评估者进行优选，缺乏竞争性，往往与现实不符。
Objective: to study the effects of Kava Pyrons on ability of resistance to oxygen absence of mouse.
目的：研究卡瓦内酯对小鼠抗缺氧能力的影响。
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