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				因素;要素
				A factor is one of the things that affects an event, decision, or situation.
例句
						Physical activity is an important factor in maintaining fitness.
						进行体育活动是保持身体健康的一个重要因素。 
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				(增长的)倍数
				If an amount increases by a factor of two, for example, or by a factor of eight, then it becomes two times bigger or eight times bigger.
例句
						The cost of butter quadrupled and bread prices increased by a factor of five.
						黄油价格涨了 4 倍,面包价格涨了 5 倍。 
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N-SING
				系数
				You can use factor to refer to a particular level on a scale of measurement.
例句
						...suncream with a protection factor of 8.
						防晒系数为 8 的防晒霜 
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				因子;因数
				A factor of a whole number is a smaller whole number which can be multiplied with another whole number to produce the first whole number.