factor /ˈfæktə/ CET4 TEM4 ( factoring, factored, factors )

• 1. 

  N-COUNT A factor is one of the things that affects an event, decision, or situation. 因素

  例：

  Physical activity is an important factor in maintaining fitness.

  体育活动是保持健康的一个重要因素。

• 2. 

  N-COUNT 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. 倍数

  例：

  The cost of butter quadrupled and bread prices increased by a factor of five.

  黄油的价格是原来的4倍，面包的价格上涨了5倍。

• 3. 

  N-SING You can use factor to refer to a particular level on a scale of measurement. 系数

  例：

  A sunscreen with a protection factor of 30 allows you to stay in the sun without burning.

  一种防护系数为30的防晒霜使你能够待在太阳底下而不被晒伤。