■ contribute 与 contribution

无论是动词或名词，意义都不一定限于正面的“贡献”，也可以表示负面的“助长作用”。

• air travel's contribution to global warming航空交通对全球变暖起的影响
• Soaring land prices contribute to the high cost of housing.地价飞涨，使得建房成本很高。
• His carelessness contributed to the accident.他的粗心大意，也是造成事故的一个原因。
• Smoking is a major factor contributing to lung cancer.吸烟是引起肺癌的一个主要因素。

• morning 与 mourning
• most
• most
• most of
• most of all
• most 与 most of
• motor
• mourning
• mouse
• mouse 与 rat
• mouth
• movement
• movement 与 campaign
• movie
• mr
• mr.
• mr., mr
• mrs
• mrs.
• mrs., mrs
• much
• much
• much as
• much less
• much of a