DDT is a chemical that was once used in huge amounts to kill insects on farms, and also to kill mosquitoes and lice. It worked very well, so after the mid-1900s many countries sprayed it widely.

DDT DDT is a chemical是一種化學藥劑 that was once used in huge amounts曾經被大量使用 to kill insects on farms,用來殺農田裡的蟲 and also to kill mosquitoes and lice.也用來殺蚊子和蝨子。 It worked very well,它的效果非常好 so after the mid-1900s所以二十世紀中期以後 many countries sprayed it widely.很多國家都廣泛噴灑它。

Though actually, it does not go away quickly: it stays in soil, water, and animals, and it can thin birds’ eggshells and build up in the food chain. From the 1970s on, a lot of countries banned it for farming.

Though actually,不過其實 it does not go away quickly:它不會很快消失： it stays in soil, water, and animals,它會殘留在土壤、水和動物體內 and it can thin birds' eggshells而且會讓鳥蛋的殼變薄 and build up in the food chain.並在食物鏈裡累積。 From the 1970s on,從一九七零年代起 a lot of countries banned it很多國家都禁止使用它 for farming.在農業上。

It is not the everyday bug spray in a Taiwan kitchen. Some health programmes have still used it in a tightly controlled way indoors, to kill mosquitoes that carry malaria.

It is not它不是 the everyday bug spray一般常見的殺蟲劑 in a Taiwan kitchen.在台灣廚房裡用的那種。 Some health programmes有些衛生計畫 have still used it還是有在使用它 in a tightly controlled way用嚴格管控的方式 indoors,在室內 to kill mosquitoes that carry malaria.用來殺帶瘧疾的蚊子。

People say the three letters one by one, D-D-T. It is a thing, not a company name.

People say the three letters one by one,大家會一個字母一個字母念 D-D-T.D-D-T。 It is a thing,它是一種東西（藥劑）， not a company name.不是公司的名字。