In many places cities have been built just above a so-called "malaria line", above which malaria-bearing mosquitoes cannot survive (Nairobi is one example).
在很多地方，很多城市建立在“疟疾线”水平之上——意即可以传播疟疾的蚊子无法生存的水平线上。内罗毕就是个例子(肯尼亚首都：译者注)。
But the traditional first line of attack on malaria, killing the mosquitoes themselves, has yet to have a serious makeover.
但是传统的针对疟疾的第一条防线——杀死蚊子，已经发生了严重的转变。
For individuals personal protection against mosquito bites represents the first line of defence for malaria prevention.
个人防护蚊虫叮咬则是预防疟疾的第一道防线。
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