To determine whether differences in national trends in tuberculosis incidence are attributable to the variable success of control programmes or to biological, social and economic factors.
判断不同国家结核病发病率趋势的差异是否可归咎于结核控制规划的成效或生物学、社会和经济因素。
Transmitted SHG signals were measured on a stilbazium salt LB monolayer with variable angle of incidence.
在此基础上，对一种芪盐LB膜样品进行了变入射角的透射二次谐波产生研究。
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