妊娠期体重增加过低
Low weight gain in pregnancy
体长体重关系
Length-weight relationship
体重－体长关系
weight-length relationship
相对日均体重增长率
mean relative growth rate
长期增大系数法
method of the long-team addition coefficient
长期增强UV-B辐射
long-term intensified UV-B radiation
长期重度慢性疾病儿
child with serious chronic illness
对数增长期
period of logarithm increasing