At the same time he heard, or imagined he heard,a light, soft step and then another.

VOA: special.2009.10.31

So, we'll take a little bit of a step back after we introduce quantum mechanics, and talk about light as a wave, and the characteristic of waves, and then light as a particle. And one example of this is in the photoelectric effect.

等我们介绍完量子力学后,我们要回过头来讨论下光,作为一种波和它的波动性特征,以及光作为一种粒子,其中的一个粒子就是光电效应。

麻省理工公开课 - 化学原理课程节选

Repeating the address to the Tamilian boy from the shop, he set off with a slow, light step, like a fat man jogging.

NEWYORKER: The Elephant

With LED headlamps and taillights already proliferating among upscale cars these days, BMW says the laser represents the next step in car light development.

FORBES: BMW Developing Lasers for Cars

Perhaps more pleasing to Collins, though, was seeing Santana take another step forward in a light bullpen before the game.

WSJ: Mets' Niese struggles against Venezuela