inserted very far up into the colon to

就可以通过镜头
actually let you look through a lens

深入结肠深处
at what's happening on the surface of the tissue.

观察在组织表面发生了什么
This has been a very important advance in terms of

这已经成为了一个重要的进步
identifying cancer of the colon,for example.

来识别如结肠癌这样的癌症
Similar scopes are available to look in the lung for lung cancer

用相似的镜头也可深入肺部用来排查肺癌
and to look in a variety of other sites in the body

还有观察很多身体的其他部位
to look for cancer and other diseases.

来排查癌症及其他的疾病
A lot of engineering technology

很多的工程技术
has been brought to bear on the problem

被集中用在诊断癌症
of diagnosing cancer and diagnosing cancer early.

及早期癌变上
What do you do if a cancer is present?

如果你身体出现了癌变你会怎么做