on occasion
英 [ɒn əˈkeɪʒn] 美 [ɑːn əˈkeɪʒn]
释义：有时, 偶尔
短语
on the occasion 在这种时候 ; 届时
on the occasion of 其时 ; 请允许我借……的机会
Depends On Occasion取决于场合
例句：
She had on occasion praised him extravagantly.
她有时曾过分地表扬他。
《柯林斯英汉双解大词典》
He has been known on occasion to lose his temper.
大家都知道他有时会发脾气。
《牛津词典》
It is, however, necessary on occasion to work outwith these hours.
然而，有时有必要在这些时间之外工作。