Searching for the effect biomarkers of long-term and low-level exposure to op has a very important meaning in detection of the earlier harmful effect of exposed populations in time.

探讨长期低剂量接触OP的效应标志物，对于及时发现职业接触人群早期健康损害，预防和控制慢性农药中毒具有十分重要的意义。

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Organizers stress the co-op is open to all shoppers - not just members.

VOA: standard.2010.07.28

And they have to put in a certain amount of work time, working at the Food Co-op.

他们得抽出一部分时间去食品供销社工作。

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For the last few years, a common question has been bandied about, from technology conferences to op-ed columns: What is Yahoo?

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That combustible mix of charm and intellect was on vibrant display last week as the two men grinned their way from photo op to photo op, cementing what they clearly hope will become a fast friendship of mutual interest and political romance.

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To be clear, the Co-op isn't going to withdraw from banking tomorrow, so there is no reason for Co-op depositors to feel they are going to be left high and dry.

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