Did they've thoughts about possibly using DDT?

他们有考虑使用DDT滴滴涕吗?

In 1972 the use of DDT was banned in the United States.

1972，全美用杀虫剂“滴滴涕”。

Like bald eagles, their populations had been killed by widespread DDT pesticide use.

与秃鹰一样，它们的种群也因滴滴涕杀虫剂的广泛使用而死亡。

And in 1972, the EPA issued a partial ban on the use of DDT.

1972 ，环保局宣布对滴滴涕有条件的用。

The letter was the push Carson needed to investigate DDT.

正是这封信促使卡森展开了对滴滴涕的调查。

DDT and other pesticides had become popular with the public and the government because they were so effective.

DDT和其他杀虫剂很受公众和政府欢迎，因为它们很有效。

And DDT and PCBs two of the most poisonous and long-lasting substances known continue to threaten aquatic wildlife.

滴滴涕和氯联苯是已知的两种毒性和持久性最强的物质，它们继续威胁水中的野生动物。

DDT was originally used during World War II to shield crops from insects and protect soldiers from insect-borne diseases.

二战期间，滴滴涕原本被用于保护庄稼不受虫害，并防士兵患上虫媒传染病。

It was part of a project to control mosquitoes. Many songbirds and harmless insects were killed by the DDT.

DDT是为了控制蚊子，很黄莺和无害的昆虫都被DDT杀死。

Rachel Carson did not live to see how her book influenced the government's decision to ban DDT.

蕾切尔·卡逊并没有活着看到自己的书籍如何影响政府决定DDT。

The writer blamed their deaths on a pesticide called DDT that exterminators had sprayed on a nearby marsh.

写信人认为鸟儿的死因与一种叫滴滴涕（DDT）的杀虫剂有关，灭虫员将这种药喷洒在了附近的沼泽里。

Also, many mosquitoes have developed resistance to DDT.

此外，许蚊子已经对滴滴涕产生了抗药性。

Did they've thoughts about possibly using DDT?

GUPTA：他们有没有想过可能使用 DDT？

In spite of this and other mishaps, the US Department of Agriculture and chemical companies extolled the benefits of DDT.

尽管发生了一次又一次的意外，美国农业部和化工企业仍然不懈地鼓吹着滴滴涕的优势。

Over time, those fields leached DDT and other pesticides into the lake.

随着时间的推移，这些田地会将滴滴涕和其他杀虫剂渗入湖中。

She suggested that exposure to DDT might alter the structure of genes, with unknown consequences for future generations.

她还推断滴滴涕可能改变基因结构，对生物体的后代造成无法预测的后果。

Others objected that Carson hadn't mentioned DDT's role controlling the threat insects posed to human health.

其他人则批判卡森对滴滴涕避免人体遭受虫害的功效闭口不言。

People started using DDT to eradicate or kill, destroy, get rid of, a certain kind of ant.

人们开始使用 DDT 来根除或杀死、摧毁、摆脱某种蚂蚁。

By 1972, DDT had been banned in the United States, and yet traces still linger in the environment today.

到 1972 ， DDT 在美国已被用，但至今仍残留在环境中。

And once DDT was banned, the male population could rebound so the females didn't need to pair up anymore.

露露：一旦滴滴涕，雄性数量就会反弹，因此雌性不再需要配对。