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Fluid shear is the mechanical force exerted by the movement of fluids over cell surfaces and has been found to play an important role in cellular differentiation, development and function.

流体剪切力是由于液体流经细胞表面所产生的一种机械力，目前发现其在细胞分化、发育及行使细胞功能的过程中起到了巨大的作用。

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Mechanical energy is conserved, because gravity is a conservative force.

机械能是守恒的，因为重力是守恒力。

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The growing awareness of World War I as a grotesque tragedy, where millions of young men were being slaughtered by the unprecedented force of new mechanical weapons, surely influenced Epstein's decision to ruthlessly alter his original idea.

WSJ: Masterpiece: Jacob Epstein's Prophesy

These are mechanical devices used to provide force in a straight line.

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In terms of reliability impact, more and more work is done in the lab, typically on a dynamometer (a device which measures force), to prove the major mechanical systems on the car.

BBC: McLaren deny missing winter testing session is risky