This paper reports the background contents of 61 elements in Chinese soil and the distribution character and change trend of the distribution of some elements in the whole country.
本文报告了中国土壤61种元素的背景值以及某些元素在全国的分布特征和变化趋势。
IllFurther, corrosion level and mechanical properties of the CRC beams were studied based on the distribution character of the surface cracks.
然后,基于受腐蚀钢筋混凝土构件表面裂缝的分布特征研究了构件的腐蚀情况及其力学特性。
Objective To describe blood lead levels (BLLs) and the distribution character of children in China as a whole.
目的描述我国儿童血铅整体水平及分布特征。
AIM: To investigate the distribution character of abnormal blood lipid in Han and Korean nationalities in urban of Yanbian area.
目的:调查分析延边农村地区汉族和朝鲜族居民血脂异常分布特征。