The cause of the fire is not yet known.

火灾的原因尚不清楚。

《牛津词典》

The immediate cause of death is unknown.

造成死亡的直接原因不明。

《牛津词典》

Unemployment is a major cause of poverty.

失业是贫困的主要原因。

《牛津词典》

President Barack Obama has a plan to deal with a central cause of the economic crisis: America's troubled housing market.

VOA: special.2009.02.20

All of Milton's labors in the cause of liberating England from the tyranny of monarchy had in some way - could be construed as having been useless.

弥尔顿为把英国从君主暴政解放出来,所做的努力在某种程度上,可以说是付之东流了。

耶鲁公开课 - 弥尔顿课程节选

cause I really, I do agree with, in love with the overall concept of what Miss America or Miss Universe represents.

因为我真的，我非常同意，我喜欢美国小姐或者环球小姐代表的整体理念。

选美比赛的好处 - SpeakingMax英语口语达人

Earth warming: Yes, carbon dioxide in the atmosphere is considered a cause of earth warming.

FORBES: The Holy War on SUVs

Its plans hinge on eliminating the largest cause of road accidents -- the drivers themselves.

ENGADGET: blogger-avatar

The mold cases center on the scientifically preposterous claim that mold is the cause of many human ailments.

FORBES: Seventh-Amendment Follies