1·Of the dozen insecticides WHO has approved as safe for house spraying, the most effective is DDT.
在世卫组织已批准的可安全用于室内喷洒的十几种杀虫剂中，最有效的是滴滴涕。
2·Environmental Defense, which launched the anti-DDT campaign in the 1960s, now endorses the indoor use of DDT for malaria control, as does the Sierra Club and the Endangered Wildlife Trust.
在1960年代发起反对滴滴涕运动的环境防护组织现已认可室内使用滴滴涕控制疟疾，塞拉俱乐部和濒危野生动植物信托基金也表示了支持。
3·WHO put its authority behind the use of DDT for indoor residual spraying.
世卫组织支持使用滴滴涕进行室内残留喷洒。
4·What was not known at the time, however, was DDT’s propensity to accumulate, persist and damage the environment.
然而在那时没有人知道，滴滴涕有富集性，稳定性并且破坏环境。
5·But a growing demand for food drove a global shift to synthetic pesticides last century, especially once DDT and similar insecticides hit the market.
但是上世纪食物的巨大需求导致化学合成农药在世界范围内大量使用，尤其是滴滴涕和类似的农药问世以后。