研究星团的天文学家已经注意到质量一定的行星(通过追踪表面阴暗冷却斑点来测量)，其旋转速度随着其星龄呈现可预测性的变化。

Astronomers who study star clusters have noticed that the speed at which a star of a given mass spins (measured by tracking cool, dark spots on the surface) also seems to vary predictably with age.

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研究同时显示，烟龄达到一定年数的人会产生一种不健康的微黄色的肤色。

It also has been shown that people who smoke for a number of years tend to develop an unhealthy yellowish hue to their complexion.

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结论孕妇风疹病毒感染与孕次有一定的关系，与孕龄无关。

Conclusion: There was some relationship between Rubella virus infection in pregnant women and parity.

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