Saying President Obama has offered Iran every opportunity for constructive diplomatic dialogue on its nuclear program, Senate Democratic Foreign Relations Committee chairman John Kerry said more robust sanctions are in his words the only way to dramatically increase the economic and diplomatic pressure on Iran from the outside and help leverage pressure on the regime from its own population which wants a different relationship with the world.

VOA: standard.2009.09.25

It's an opportunity to deal with those perhaps in a more constructive way, than letting the feeling spiral.

也许可以借这个机会用更有建设性,的方法应对，而不是使负面情绪恶化。

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When we were talking about constructive interference, we had more electron density in between the 2 nuclei.

当我们讨论相长干涉的时候，在两个原子核之间有更多的电子密度。

麻省理工公开课 - 化学原理课程节选

So let's think of them a little bit more by graphing the amplitude of the wave, and seeing how we can have this constructive interference.

让我们把波的,振幅画出来考虑一下,我们怎么能得到这种相长干涉。

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