■ 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。

• solitude
• solitude
• solitude 与 loneliness
• so long as
• solution
• some place
• someplace
• someplace 与 some place
• something of a
• some time
• sometime
• sometimes
• sometimes
• sometime, sometimes 与 some time
• so much as
• so much for
• soon
• sooner
• sophisticated
• sophisticated, sophistication
• sophistication
• sorry
• sorry
• sorry, but
• soul