Colonies of sea mammals are getting smaller.

海洋哺乳动物栖息地正在变小

They now face a new threat

现在面临着新的威胁

canals and the railroads; crowding with a population that

加上运河和铁路 大量流动性强

and large cities.

还有许多大城市

and so people come to be in the court of the tyrant.

因此人们去的是僭主的法庭

that is characteristic of this period. than ever did before,

比以往任何时候更加明显

France does have large cities, above all Paris,

法国确实有大城市 最大的是巴黎

of what in French--and in English, the same word--

在法语中 英语中也是同样的单词

The disease would then spread along inland transportation networks.

疾病会沿着内地的交通运输网而传播

and of a defective urban infrastructure,

尤其当这个城市的基础设施存在缺陷

Today, I want to do the impossible

今天 我想挑战一下

It builds on what you're reading

这些都以你们所读过的资料为基础