Other factors impacting a planet's climate and suitability for life include its star's age, composition and the size and location of sibling planets in the system.

其他影响行星的气候和适合生命的稳定性的就是它自身的年龄，构成，尺寸以及所在体系邻近星星的位置。

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Age composition of the catch was analysed.

分析了渔获物的年龄组成。

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Different case classifications had different age composition.

病例分型不同，年龄构成不同。

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But no definitive study has been published showing whether these small changes in body composition are enough to truly slow age-related declines in physical performance.

FORBES: Sweet Syringe of Youth

Using a combination of modern physics tools--including three-dimensional, high-resolution X-ray, radiocarbon dating with accelerator mass spectrometry, and infrared spectroscopy--the researchers analysed the tooth to determine the age and composition of a resinous filling detected inside.

UNESCO: Basic Sciences

Many of the people that will contribute to it have already been born, so short of some catastrophe that kills off large numbers of people, or some Viagra-fuelled leap in birth rates, population numbers and age composition can be predicted with fair accuracy for decades ahead.

ECONOMIST: Demographics: Greying globe | The