occasion定语从句用法

occasion的简明意思：

n. 场合；时机；理由；机会；盛大场面

vt. 引起；致使

An occasion lost cannot be redeemed.

时机失了无法挽回。

The video camera that one single mother bought for a special occasion， for example， is not much fun now

比如，一位单身母亲为特殊场合购买了摄影机，现在她不觉得这台摄影机多有趣了。

I will speak to him if the occasion arises.

如果有机会我将跟他说。

Luckily for you， you have no more occasion to do it than I had.

你很幸运，你同我都没有这样做的理由。