因此产生的气压不足以形成巨大的快速振动。

The amount of air being force by the lips isn't enough to create those huge, rapid vibrations.

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风中振动时，刷毛会产生反作用力，但同时它也可以减少机翼滑流，产生一个低气压乱流，机翼上形成回力，因而减小阻力。

Vibrating in the wind, the bristles create some drag. But they also reduce the wing's slipstream, an area of low-pressure turbulence that pulls back on the wing, and hence reduce drag.

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通过测量凿岩机工作时的振动频率、钎杆转速、气温、气压和耗气量等性能参数，自动生成测试报告。

By testing vibration frequency, moving speed of drill rod, atmospheric temperature, pressure and consumption, a test report is automatically worked out.

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