英语翻译 急用 高分悬赏。谢谢

Question

翻译成英文。。

众所周知, 肺癌至少部分地是由于吸烟过多而引起的.

Answer 1

As we know,a quite amount of people who got a lung cancer are caused by smoke too much.
如我们所知,相当一部分患肺癌的人都是由于吸烟过多所引致的

Answer 2

一楼的一看就是机器翻译的哈，错了的。

As we know,the lung cancer is partly caused by smoking too much .

Answer 3

As we know,the course of lung cancer at least is smoking too much partly

Answer 4

As everybody knows, the lung cancer is, at least, partly resulted from smoking too much.

Answer 5

As we know,smoking is more or less the course of lang cancer.