I used first the conservation - of mechanical energy — there was no friction — and then I showed you that it's completely consistent with the work-energy theorem, so what would you do now?

首先，我用了机械能，守恒定律-，这里没有摩擦力-，我会向你们展示，这，和功能定理完全一致，现在你会怎么做呢？

youdao

Keeping dynamic equilibrium of friction sheet internal temperature and working environmental temperature was required to ensure it work normally.

摩擦片正常工作的条件之一是其内部温度与工作环境温度差保持动态平衡。

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Wear failure refers to the relative sliding friction between the surfaces causes the surface of the metal continue to wear their work arising from the failure.

磨损失效系指表面之间的相对滑动摩擦导致其工作表面金属不断磨损而产生的失效。

youdao

"My own readings or misreadings of historical material, that kind of falsification is what creates friction or energy in the work, " she says.

WSJ: Ellen Gallagher, the Global Art Star | WSJ. Magazine May 2013

Another common type of massage, so-called deep tissue, tends to be more targeted to problem muscles and includes techniques such as acupressure, trigger-point work (which focuses on little knots of muscle) and "deep transverse friction" where the therapist moves back and forth over muscle fibers to break up scar tissue.

WSJ: Don't Call It Pampering: Massage Wants to Be Medicine

Many foreigners who were parachuted into the company at its launch by Groupon (most of whom were from Germany) are no longer with the company after a lot of friction with the JV partners from Tencent about how to make the venture work in China.

FORBES: Groupon's Foray Into China Sounds Like a Disaster