We believe that a force of about one hundred pounds was needed to pull the string all the way back on a long bow.

我们认为，拉动长弓上的弓弦大约需要100磅的力。

youdao

youdao

youdao

She also linked it to a one to two point increase in the number of women in the labor force.

VOA: special.2010.03.04

Gravity is one force that acts on a body without the source of the force actually touching it.

引力是一种受力物体收到了力的作用,但却没有接触施力物体的力

耶鲁公开课 - 基础物理课程节选

We can be precise about how much bigger by saying, "If the acceleration of a body to a given force is ten times that of a one kilogram mass, then this mass is one-tenth of one kilogram."

我们能精确地知道质量能大多少,只需要说,"如果物体在给定力作用下的加速度,是一个 1 千克物体的加速度的 10 倍,那这个物体的质量就是 1 千克的十分之一"

耶鲁公开课 - 基础物理课程节选

There are obviously a number of complicated logistics involved with moving Air Force One, moving a plane of reporters, events, local stops, phone calls involved.

WHITEHOUSE: The White House

Picture the gold price as a pulley with gold company executives applying force on one side of a rope.

FORBES: Gold Miners Can Do Much Better Than Price Of Gold

It quickly established its mastery of the new media ecosystem with a video hoax that showed designer Marc Ecko spraying graffiti on Air Force One, one of the first instances of viral marketing on YouTube, then only a year old.

FORBES: Perfect Pitch: How Droga5 Is Making Ads You Can't Ignore