In practice ,a rotor weighing about 10 tons and rotating at 3,000 r .p . m . may be so well balanced that the motion ,except for sound ,is just perceptible.
实际上，一根据重约10吨、每分钟3000转的转子可以平衡得非常好，以致除了响声外，人们几乎觉察不出它是在转动。 [分析]此处just =almostnot, hardly 曾误译为“正好觉察得出……”，这样意思就反了
Stability chair's movement form is the bodily vertical motion steadily, challenges body's balanced and the strength.
稳踏椅的运动形式是身体上下运动，挑战身体的平衡和力量。
Practicing the Tai Chi solo form teaches one to remain balanced, focused and relaxed while in motion.
这种训练方式是叫一个人在运动的过程中保持平衡、放松、且集中精神的状态。
Then the factors influencing the synchronism and stability of the shaker are discussed. At last the conditions of balanced elliptical motion are presented.
讨论了影响振动筛同步性能和稳定性的因素，给出了要实现平动椭圆运动的条件。
In practice, a rotor weighing about 10 tons and rotating at 3, 000 r. P. M. May be so well balanced that the motion, except for sound, is just perceptible.
实际上，一根据重约10吨、每分钟3000转转子可以平衡得非常好，以致除了响声外，人们几乎觉察不出它是在转动。
In practice, a rotor weighing about 10 tons and rotating at 3, 000 r. P. M. May be so well balanced that the motion, except for sound, is just perceptible.
实际上，一根据重约10吨、每分钟3000转转子可以平衡得非常好，以致除了响声外，人们几乎觉察不出它是在转动。
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