Ageing is another fundamental factor for the development of cancer.

老龄化是癌症形成的另一个基本因素。

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Inside a chelate ring exists strain which is the fundamental factor to in-fluence its stability.

螯环存在着张力，张力是影响螯环稳定性的根本因素。

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Population is the most fundamental factor in the big system of population, resources and environment.

人口是人口、资源与环境巨系统中最根本的因素。

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That is a bearish underlying fundamental factor for the precious metals markets at present.

FORBES: P.M. Kitco Metals Roundup: Gold Ends Weaker amid Firmer U.S. Dollar Index, Bearish Near-Term Technical Posture

The China news Thursday is also a bullish underlying fundamental factor for the precious metals.

FORBES: A.M. Kitco Metals Roundup: Gold Solidly Higher amid Bullish Outside Market Forces

The European Union debt crisis remains a major bullish fundamental factor for the gold market.

FORBES: P.M. Kitco Metals Roundup: Comex Gold Ends Up, at New Record-High Close, amid Bullish "Outside Markets"