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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TACHOMETER generator, a small electric generator for supplying current at a frequency proportional to the speed of rotation.

测速发电机，提供频率与转速成比例的电流的小发电机。

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Distribution of light intensity, transmittance of fabrics, speed of rotation, temperature and humidity have influence on the test precision.

光强分布、织物透光、旋转速度、温湿度等都会影响测试精度。

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Starting with such a high speed of rotation, these pulsars continue to emit signals for billions of years before fading out.

ECONOMIST: The dizziest, giddiest stars

This involves pitching the machine's nose up to reduce its forward velocity and increase the speed of rotation of the blades (and thus the amount of lift they provide) to soften the landing.

ECONOMIST: Monitor

The key property of a satellite orbiting precisely 35, 786 km (22, 240 miles) above the equator is its speed, which mimics the rotation of the Earth below.

BBC: NEWS | Technology | Arthur C Clarke: predictions