中文翻译成英文(不用机器的)

以上是对于世界上铁路普遍有的问题,接下来我将讲一些具体的影响
These are generally some of the world's railway problem, then I'll talk about some specific effects

如果已经有影响。。
Now that I have discussed some of the problems affecting railway systems worldwide, I will investigate the specific consequences that result.

Just then I talked about the problems occur in the railway system through the world. Next I am going to talk about some specific consequences.