primary magma是什么意思

用法例句

Oxidizable organic carbon in soils originated from different parent rocks;

不同母岩发育土壤的可氧化态有机碳

According to the results of field invcstigation and the lithological characteristics of Parent rocks and the degree of weathering,a preliminary classification of laterite along Nanning-Nali Line of NanKun Railway is suggested.

本文在野外调查的基础上，根据母岩岩性和红土化作用程度对南那段红土作了初步分类，并对几种主要的红土的物质成分和微观结构特征进行了研究。

The results of preliminary analysis to the experiment data showed that there was rather close correlation between size of planting hole and parent rocks and soil textures.

对试验资料的初步分析表明 ,马尾松造林地整地规格与母岩和土壤质地之间存在较为密切的相关关系。

Effects of the growth of Swida wilsoniana by different afforestation density,altitude and mother rock;

不同密度、海拔及母岩对光皮树生长的影响

Their cause of formation had relation with mother rock type.

绍兴市低产林地的主要土壤类型有６个土类、７个亚类、１１个土属和１３个土种，其成因都与母岩种类有关，因地制宜选择适生树种是主要对