Tonight, he visits Colorado, where natural gas is taking center stage, prompting questions about the future of both coal and alternative energy resources.

今晚，他访问了科罗拉多州，天然气在那里占据了中心位置，引发了对煤炭和替代能源的未来的质疑。

We're up to the last one now so what we're going to do is add a prompting question to our main question and this is something that we do all the time to help reach a decision faster.

我们现在已经到了最后一个了，所以我们现在要做的事情是在我们的主问句之后加一个提示性问题，当我们需要快速决定一件事情的话，就需要它的帮助啦。