不同年龄儿童低体重率、消瘦率和贫血患病率差异有统计学意义（P<0.05）；
The prevalence of underweight, wasting and anemia were different in different age groups(P<0.05).
本次调查低出生体重率的危险因素有多胎、多产次、 孕周不足、高海拔、低国民生产总值及妇女贫血等。
The riskfactors of LBW rate included multiple fetus, multiple parturition, inadequate duration of pregnancy, high altitude, low GNP and maternal anemia, et al.
为了获得有关唱歌能量消耗的经验数据，托马斯研究了鸣声率与雄性夜莺在夜间的体重变化之间的关系。
To obtain empirical data regarding the energy costs of singing, Thomas examined the relationship between song rate and overnight changes in body mass of male nightingales.
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