So the spring force is opposing that, so the spring force has a minus sign here to indicate the direction.

弹力方向相反，所以弹力有个负号，来表示方向。

youdao

As fluid is released the system pressure decreases until the spring force re-seats the poppet.

液体从系统中被排出时，系统压力降低，直到在弹簧压力作用下阀门回复原位。

youdao

In this paper some of the problems encountered in the calculation of the valve spring force are discussed.

本文概述了目前计算气阀弹簧力中所存在的一些问题。

youdao

The anger of the many educated but unemployed young people has been a driving force in the Arab Spring movement.

VOA: special.2011.05.27

Even in the case of this spring, when you pull it, if you pull it to the right by some force.

甚至是在这样的弹簧问题中,当你拉它的时候,如果你用力向右拉

耶鲁公开课 - 基础物理课程节选

I draw a graph here of the amount by which I pull the spring versus the force it exerts.

我在这里画个图,纵轴是弹簧的拉伸量,横轴是力的大小

耶鲁公开课 - 基础物理课程节选

Prime Minister GORDON BROWN (United Kingdom): Subject, of course, to conditions on the ground, we plan from next spring to reduce force numbers in Southern Iraq to a figure of two and a half thousand.

NPR: U.K. to Bring More Troops Home

They will also be automatically available for those on the new system of personal independence payments (Pip) which come into force next spring.

BBC: Blue badge disabled parking to be extended in Wales

With an overabundance of highly motivated graduates with impressive degrees entering the work force each spring, Major League Baseball can capitalize on the apprehensions of young adults when it comes to pursuing traditional and unstable careers in banking, financial services and law.

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