as bringing their foreign destructive habits into American cities.

他们被认为将外国的恶习带到美国了
In fact, the history of American drug wars

事实上美国的反毒战争
can be told as a series of waves of racial and ethnic fears.

可以归结为一系列的种族恐慌潮
Prohibitions on smoking opium but not using liquid morphine,

禁止吸食鸦片但允许使用吗啡液体的禁令
which was the sort of practice of middle and upper class white women,

就是基于中上阶层白人妇女的实际状况
they used to take a little nip or other forms of morphine

一个世纪前反毒斗争初步成形的时候
to get through the day, that was continued to be fine

她们曾依靠吸食一小杯的吗啡
as the drug wars began to take shape a century ago.

来舒心地过完一天
Prohibitions on smoking opium were inspired specifically

而鸦片禁令则是由十八世纪七十年代的
by fears of Chinese immigrants beginning in the 1870s.

中国移民潮恐慌引发的
You get these sort of horrifying examples,

你可以看到这些可怕的例子
again I'm using popular culture examples

我又一次用了大众文化的例子