The result showed that ratio of single and double layer of fluorescent intensity or the change of degree of polarization weren't difference(P>0.05).
结果表明，两者单、双体荧光强度比值及荧光偏振度的变化，差异均无显著性（P＞0．05）。
The screen are two kinds, single layer or double layer.
筛面可分单层或双层筛网。
The screen are two kinds, single layer or double layer.
筛面可分单层或双层筛网。
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