The results showed that the imposed vibration may increase effectively the bubble nucleation rate, which was better than that via increasing rotation speed.
实验发现，提高转速可以提高熔体的剪切应力，从而提高气泡成核率，但不如施加振动效果明显。
When I stroked first with the other arm, I added the power of core-body rotation to that first stroke – increasing the distance and speed of my breakout to the surface.
但当我用另外一侧胳膊的划臂作为起始的话，在第一次划臂时我会把力量用在身体轴心的旋转上---这样增加了划臂的距离和速度。
With increasing shaft speed of rotation, heat evolution and temperature rise become a critical problem.
由于轴的转速越来越高，轴承的发热和温升是个突出矛盾。
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