... relative surplus-population ==> 相对过剩人口 relative tack ==> 相对粘性 relative term ==> 相对项 ...
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粘性是液体流层问相对运动而产生的摩擦力或阻力。油层间所产生的运动阻力称为粘性摩擦力。
Viscous friction is the fiction, or resistance to relative motion, between adjacent layers of liquid. The resistance of motion between these oil layers is called viscous friction.
汽车车速、转向系统扭转刚度和主销后倾角对回正性能的影响较大，而转向系统的粘性摩擦系数对回正性能的影响相对较小。
Returnability is affected mainly by automobile velocity, torsional stiffness of steering system and caster angle and relatively little by viscous friction coefficient of steering system.
我国近期颁布的设计规范，对土石坝的无粘性粗粒坝料的要求是以相对密度确定其填筑标准。
According to the specification recently promulgated, it is required to determine filling criteria of incoherent coarse grain materials on the basis of their relative density.
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