Smoking can cause lung cancer.

　　吸煙可致肺癌。

　　She is always causing trouble for people.

　　她總是給人添麻煩。

　　用作名詞(n.)

　　Police are investigating the causes of the explosion.

　　警方正在調查爆炸的原因。

　　You have no cause for complaint.

　　你沒(méi)有理由抱怨。

　　World peace is a cause we should all work for.

　　爭取世界和平是一項我們都應該為之而努力的事業(yè)。

　　She is willing to donate money to a worthy cause.

　　她愿為高尚的事業(yè)捐款。