The species and the number of Ectomycorrhizal fungi (ECM fungi) are influenced by many environmental factors, such as soil factor, climate and season, and site factor.

土壤、气候和立地因子等环境因子影响树木外生菌根菌的种类及数量。

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The factors for American suburbanization are many, including technological factor, economic factor, environmental factor, and social factor.

推动美国城市郊区化的动力机制是多方面的，包括技术的、经济的、环境的和社会文化的因素等。

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Is environmental extremism one factor of many?

FORBES: After Mishaps, Shell Dials Back Arctic Oil-Drilling Plans

Plastic electronics technology has many economic, manufacturing, form factor and environmental benefits, assuring that it will replace silicon in a variety of devices in the future.

ENGADGET: Plastic Logic kills QUE, 'shifts focus' to second-generation ProReader