He says if those with the least pollution start doing the most, rich nations will not have an excuse for inaction.

VOA: standard.2009.11.09

So, what will start with on Monday is doing the most simple example of methane using these Lewis structure rules.

因此，下周一上课,我们会先以最简单的例子--甲烷开始,使用这些路易斯结构的规则。

麻省理工公开课 - 化学原理课程节选

I feel okay to start doing something that we've planned to do or that we've intended to do.

我觉得是时候做那些我们之前计划的或想做的事情了。

I'm ready to 课堂 - SpeakingMax英语口语达人

Because if we do, we can really unleash some of the potential, the bottled up potential in our economy that exists -- as many economists have said that 2013 could be a very strong year economically if Washington would stop doing harm to the economy and start doing things that would help the economy.

WHITEHOUSE: Press Briefing

The problem with doing everything right is that eventually other people start doing it, too.

FORBES: Magazine Article

We know what this kid is capable of doing on the rugby field - he just needs to start doing it again.

BBC: Jeremy Guscott column