Light travels basically a foot in a nanosecond. Simple rule of thumb.

光行进的速度是每纳秒一英尺，很简单的经验法则了。

youdao

This form felt light and airy on the foot. So we called it the 'Mojito' as it was rather like a twist of lime skin.

这种方式让脚感到既轻便又通风，之所以我们称它为Mojito，是因为它更像一条扭转的皮带。

youdao

In the pale light of the tunnel, 30-foot fossil traces of lycopsid gleam slickly in the shale roof like alligator skins.

在隧道内黯淡的灯光下，页岩顶部30英尺长的石松化石遗迹就像鳄鱼皮般发出柔滑的光亮。

youdao

A gig is 10 to the 9, so it does two operations in the length of time it takes light to get from one foot off the table down to the table. That's amazing.

因此光行进一英尺的,时间内电脑可以,进行两次基本运算,这太神奇了。

麻省理工公开课 - 计算机科学及编程导论课程节选

Light travels basically a foot in a nanosecond. Simple rule of thumb.

光行进的速度是每纳秒一英尺,很简单的经验法则了。

麻省理工公开课 - 计算机科学及编程导论课程节选

Someone else who questions the light foot-print theory is David Rhode.

BBC: Is Obama's drone doctrine counter-productive?

He says that is not a light foot-print.

BBC: Is Obama's drone doctrine counter-productive?

All of that information helps shed some light on who will foot the bill.

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