cause/ kɔːz /

1.noun [c] [of event] 
起因

Nobody knew the cause of the explosion.
没有人知道这次爆炸的起因。
2.noun [u] 
(reason) 理由

3.noun [c] 
(aim,principle) 事业

He is sympathetic to our cause.
他支持我们的事业。
4.vt.
(produce,lead to) 导致

Does smoking cause cancer?
吸烟是否导致癌症?
to have cause for sth/to do sth
某事/做某事有原因
there is no cause for concern
没有理由担心
to cause sb to do sth
促使某人做某事
to cause sth to happen
导致某事发生