许多严重疾病都是由昆虫传染的。
铲除烟草会像防治昆虫传染病一样，点点滴滴都很艰辛。
And eradicating tobacco may prove every bit as hard as fighting insect-borne disease.
为所有国家提供气候预报全球变暖可能会改变非洲的大片土地：使雨带转移，使疟疾和其它由昆虫传染的疾病四处扩散，甚至能改变撒哈拉沙漠的大小。
Global warming could transform large swaths of Africa: shifting rains, spreading malaria and other insect borne diseases, even changing the size of the Sahara Desert.
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