The OD values of sera collected at different time periods from infected rats after treated with ME-2 were increased at various extent.

用2-ME处理后各时点采集的感染大鼠血清OD值均较不加处理者有不同程度的提高。

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The main investigation method this article USES is: analyzing images, contrasting utensil used at different time periods, and integrating both analysis and investigation.

本文运用的主要研究方法是：图像分析、各个时期器具的比对、综合分析研究。

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The four existing service providers will deliver service in different time periods, and at different costs.

现有的四个服务提供商交付服务的时间和成本不同。

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First of all, it is critical to look for divergences on at least two different time periods, as in strong uptrends, you will often see divergences in the daily charts but not the weekly charts.

FORBES: Gold's Top: A Win for Divergence Analysis