The effect was time and cell density dependent.

此效应具时间和细胞浓度依赖性。

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There was no density dependent effect in egg period.

实验结果表明：二斑叶螨卵期不存在密度效应；

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There was no density dependent effect in egg period.

实验结果表明：二斑叶螨卵期不存在密度效应；

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