我之前谈过经度（longitude）和纬度（latitude），它们是用来标度连接两极的经线、以及平行于赤道的纬线的角度单位。

The other day I talked about longitude and latitude which are measured as angles around the equator and toward the poles.

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回归分析表明，两种离子的概率单位与浓度对数之间存在着极显著的正相关。

The regression analysis showed that there was significantly positive correlation between probit and logarithm of concentrations.

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钾肥的增产效率在两种氮肥水平下都较高，单位钾肥的增产量与土壤有效钾含量及施钾量呈极显著负相关；

The yield increase of K fertilizer was quite high at two rates of nitrogen application, and it closely relative to the content of available K in soil and potassium application rate.

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