Unlike other models of the market in illicit drugs, it takes into account two factors that are crucial to the way sellers and buyers act that tend not to be present in conventional markets.
不像其他非法毒品市场，本模式考虑到对买卖双方行动有至关重要作用的两方面因素，其在一般市场中很难见到。
The three factors of exercise at two levels orthogonal design and the linear mixed models analysis were used.
采用三因素两水平正交设计，混合模型分析。
The analysis on models showed that newness coefficient of agricultural machinery, proportion of new and old tractors are two important factors affecting on the intact rate of large medium tractors.
由模型分析可见，农机新度系数、大中型拖拉机的新旧结构比例是影响大中型拖拉机完好率的两大重要因素。
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