基本解释基本的同根派生 英汉例句OBJECTIVE To analyze perinatal mortality,death causes and change within 10 yaars in Luohu District,and to provide funcamental information for making preventive measures. 目的掌握罗湖区近10年围产儿死亡水平、死因分布情况及其变化,为制定有效干预措施提供依据。