There is positive correlation between the phosphatase activity and soil organic matter, total P and available P.

磷酸酶的活性与有机质、全P和速效P都呈正相关，但与有机质的相关性不显著；

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Soil available P was not affected by nematodes, while soil microbial biomass P increased obviously with the inoculation of nematodes.

接种线虫对土壤有效p的提高不明显，而对土壤生物量P有显著的增加。

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The increase in available P due to P fertilizer application and the yearly decrease in available P after pot culture varied greatly with soil types.

施磷肥处理所增加的有效磷比例和盆栽后土壤有效磷量逐年下降幅度因土壤类型不同而差异很大。

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So if we still have an angle of a 109 . 5 degrees, and again, we still have four unpaired electrons available for bonding, we can make one of those bonds with another s p 3 hybridized carbon, so we're going to make up one pair here.

如果键角仍然是109。,同样，我们还有4个未配对的电子可以用来成键，我们可以用其中的一个,和另外一个sp3杂化碳原子成键，这样我们可以组成一对。

麻省理工公开课 - 化学原理课程节选

The full results will be available at 2 p.m.

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