在过去的几年里我们看到一些非洲国家报告儿童死亡率降低了25 - 30%，例如马达加斯加、马拉维、莫桑比克和坦桑尼亚联合共和国。
In the last few years we have seen several African countries report reductions in child mortality of 25-30%, for example Madagascar, Malawi, Mozambique and the United Republic of Tanzania.
利用主方程的方法，研究了在一维三态周期跳跃模型下分子马达的定向运动。
The master equation approach to molecular motor's directed motion based on periodic one-dimensional three-state hopping model is studied.
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