And,that is why this campaign is so important." But that view is out of step with many in war-weary Britain.

VOA: standard.2009.08.02

Because step five is that we need to fill in our bonding electrons, and we start it with filling in two electrons per bond.

因为第五步要做的是将我们的成键电子填在这，所以我们开始在每个键处填上两个电子。

麻省理工公开课 - 化学原理课程节选

Dancing in the streets of London. This is a two-step with a purpose.

VOA: standard.2010.03.10