External rotation cycle of wind devices, extended service life.

风循环转动装置，延长使用寿命。

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The twisting had previously been blamed for a 60-year cycle in day length, but the rate of rotation found in this study suggests it is not the culprit, says Jon Mound at the University of Leeds, UK.

这种震动以前被诟病为60年周期性日长变化的原因，但该研究发现的自转速度表明，它并不是罪魁祸首，英国利兹大学的乔恩芒德说。

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The four crops grown in rotation are corn, soybean, wheat, and alfalfa, with one crop grown each year during the 4-year cycle.

轮作的四种作物是玉米、大豆、小麦和苜蓿，四年内每年种植一种作物。

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However, as the cycle has bottomed, I would expect market rotation into out-of-favor sectors, companies with dominant market positions, cash rich balance sheets, and growing end markets.

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