1.(time)时刻；时候；场合
I often think fondly of an occasion some years ago at Covent Garden.我经常愉快地回想起几年以前在科文特花园的那一次。
There are occasions when you must not refuse.总有一些无法拒绝的时候。
2.(chance)时机；机会
3.(event)重大活动；特殊时刻；庆典
The party was quite an occasion.这次的聚会非比寻常。
a unique family occasion一次独特的家庭聚会
4.to be the occasion of sth<正式>(cause)是…的原因(或理由)
His funeral was the occasion of a massive outpouring of grief.他的葬礼引发了巨大的悲痛。