采用丙酮加水提取土壤中的阿特拉津，再用三氯甲烷萃取，经浓缩、定容后，用毛细管气相色谱法测定。

Using acetone adds the water withdraws the atrazine in the soil, than extract with trichloromethane, after concentrated and settle to permit, use the capillary gas chromatography.

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取部分提取液浓缩、定容，用配备火焰光度检测器及微流控装置的气相色谱仪进行有机磷农药检测。

The extract was analyzed by gas chromatograph equipped with a flame photometric detector and a micro fluidic device with back-flush function.

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It's just how much heat is involved when we change the temperature. Now, the products have some heat capacity associated with them right, it takes a certain amount of heat if we make their temperature change, to either put it in or take it away, depending on which direction the temperature is changing.

问题就是当我们改变温度时,有多少热量发生了转移,生成物具有一定的热容,如果我们改变,它们的温度，就要输入或,提取一定的热量,这取决于温度改变的方向。

麻省理工公开课 - 热力学与动力学课程节选