nitrogen transport and transformation 氮素输移
soil nitrogen transport 土壤氮素的运移
nitrate nitrogen transport 硝态氮运移
Extensive researches are obviously necessary to address the influences of drip irrigation system operation parameters on nitrogen transport and transformation in soil since knowledge on the aspect is still limit.
关于滴灌施肥灌溉条件下氮素运移的研究较少 ,尤其在施肥灌溉系统运行参数对氮素运移、转化、分布影响的研究方面更为薄弱 ,在今后的研究中应予以加强。
参考来源 - 滴灌施肥灌溉条件下土壤水氮运移的研究进展·2,447,543篇论文数据，部分数据来源于NoteExpress
The alternative is to liquefy the hydrogen at great expense and transport it in road tankers refrigerated with liquid nitrogen.
唯一的代替方法是花大价钱用液氮作为冷却剂液化氢气，用罐车从公路上运输。
Agriculture produces more greenhouse gases than all methods of transport put together, and contributes to a host of other problems, from nitrogen pollution to soil erosion.
农业产生的温室气体比交通运输所有方式加起来还要多，并且还进一步促成了从氮污染到水土流失等许多其它问题。
The alternative is to liquefy the hydrogen at great expense and transport it in road tankers refrigerated with liquid nitrogen.
一个替代的办法是以巨大的代价把氢气液化，并用带液氮冷却的罐车运输。
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