"It describes the power needed to propel a bike against our everyday foes: gravity, weight, friction, wind resistance," he writes.

“它描述了推动自行车克服日常阻力——如引力、重量、摩擦力以及风阻——所需要的能量，”他这样写到。

youdao

It showed their instruments, food storage, and details of how they moved and worked without gravity to give them weight.

VOA: special.2009.07.15

You can see that if a was equal to g, your downward acceleration is that of gravity, namely the cable has snapped in the elevator, Then you don't feel any weight.

你会发现如果 a 等于 g,你下降的加速度就是重力加速度,也就是电梯的绳索断了,那时你会完全失重

耶鲁公开课 - 基础物理课程节选

Without the necessary vocal weight and gravity, it is hard to see Mr. Fry as much of a threat to the Faraone of Wayne Tigges, a powerful presence despite a tendency to sing sharp.

WSJ: Still Searching for the Promised Land | Moses in Egypt | New York City Opera | Opera Review by Heidi Waleson

In other green tech and design news, Hitachi unveiled an impressive new wireless controlled robot to help with the Fukushima Daiichi cleanup and London-based designers Martin Riddiford and Jim Reeves developed the GravityLight, an amazing low-energy, battery-free light that works by harnessing the power of weight and gravity.

ENGADGET: Inhabitat's Week in Green: madder root batteries, sun-powered plane and the world's first fiber-optic solar cell

Handling is impressive for a vehicle that weighs in a bit over 4600lbs -- thanks in great part to the low center of gravity, near 50-50 weight distribution and active air suspension.

ENGADGET: Tesla Model S first drive: the sports sedan goes electric (update: video)