人的身高与遗传因素有着密切的相关。然而人们在实践中发现,人体身高的增长并非完全依赖于遗传因子。以身高160～180cm之间的健康年轻人为例,决定他们身高的最大因素,在于外界的条件。1882年,莫斯科15岁小孩的平均身高为140cm;到了1923年为150cm;1983年平均高度达到了170cm。如今,平均身高增长的现象在世界上很多国家都能看到,而且有续继发展的倾向。究其故,除了生活条件的不断改善,营养水平的提高之 Human height and genetic factors are closely related. However, in practice, people find that the growth of body height is not totally dependent on genetic factors. To healthy young people between 160 ~ 180cm in height, for example, the biggest factor in determining their height is the external conditions. In 1882, the average height of a 15-year-old child in Moscow was 140 cm; it was 150 cm in 1923; and in 1983 it reached an average height of 170 cm. Nowadays, the phenomenon of average height growth can be seen in many countries in the world and there is a tendency to continue development. Therefore, in addition to continuous improvement of living conditions, the improvement of nutrition level