Boiling is the surest and perhaps simplest method of water sterilization but is only practical or possible for small displaced populations.
煮沸可能是对水杀菌最可靠并且也许是最简单的方法了，但也仅仅是针对少量难民人口是实用或可能的。
Boiling is the surest and perhaps simplest method of water sterilization but is only practical or possible for small displaced populations.
煮沸可能是对水杀菌最可靠并且也许是最简单的方法了，但也仅仅是针对少量难民人口是实用或可能的。
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