there is "not a shred of evidence" for the biological factor
生物差异的因素“没有一丁点证据”
The effect of the biological factor for the form of bronze disease was investigated.
本文探讨了青铜粉状锈中生物因素的影响。
Objective To study the biological activity of placenta factor(PF) .
目的进一步探讨胎盘因子（PF）的生物活性。
Objective To study the biological activity of placenta factor(PF) .
目的进一步探讨胎盘因子（PF）的生物活性。
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