We can plug this in further when we're talking about the visible part of the light spectrum, because we know that for n final equals 2, then that would mean we plug in 2 squared here, so what we get is 1 over 4.

当我们讨论可见光谱的时候,我们可以把这个代进去,因为我们知道n末是等于2的,这意味着我们可以。

麻省理工公开课 - 化学原理课程节选

The company says there are 33 million light- and medium-duty trucks on the road, and converting them to plug-in hybrid results in an 80 to 200 percent fuel economy improvement.

FORBES: Written by Jim Motavalli

Focus Electric, Fusion Energi plug-in hybrid and C-MAX Energi plug-in hybrid all have an LED charge port that displays a circle of light directly related to battery life.

FORBES: 8 Tips For Avoiding Electric Car Road Rage

Just plug it in (proprietary cables included), and a few seconds later a green light on the MiC let's you know you're ready to rock.

WSJ: A Loud and Clear Mic | Geek Chic