There were many ups and downs in the earth's numbers . 世界人口数量变化起伏不定。
The change of mosquito - density was positively correlated with temperature 蚊数量变化与其环境温度变化呈正相关关系。
Analysis of the canonical correlations between influencing factors and cultivated land amount changes based on cca 耕地数量变化及其影响因素的典型相关分析
Study on the genomic density polymorphism and the quantity of cr expressed on erythrocyte in the patients with hepatocirrhosis 型分子密度相关基因多态性与其数量变化的研究
Major trends in educational reform and development in china - a quantitative study of chinese educational policy since the mid 1980s 20世纪80年代中期以来中国教育政策数量变化研究