Characters, shapes and stage concentration of the contaminant were defined; and two representative drain pipes in Harbin was been measured by field experiment.

对污杂物的性质、形状以及分级浓度进行了定义，并通过实验在典型时段对哈尔滨市两处具有代表性的污水干渠进行了现场测定。

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Maybe if Betty had succeeded in removing her at this stage the others might have settled back into their concentration.

假如蓓蒂在这时就能把她拉开，其它人还是能回过神来集中注意力听课的。

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Notice the relatively quick ramp-up of proppant concentration and the large final stage.

请注意相对快速上升的支撑剂浓度和最后阶段。

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The concentration of power among retailers has led to another stage in the shift in power down the food chain.

ECONOMIST: Make it cheaper, and cheaper | The