ph.

1. She visits the city on occasion.
她有时到城里去。

1. 间或,有时：give occasion to 引起 . | on occasion 间或,有时 . | occur to 被想到 .

2. 不时地;必要时：on the fire 在考虑中 | on occasion 不时地;必要时 | on the occasion 在那时

3. 偶尔：on the increase 正增长 | on occasion 偶尔 | on second thought 仔细考虑

adv

1. now and then or here and there

e.g. he was arrogant and occasionally callous
open areas are only occasionally interrupted by clumps of trees
they visit New York on occasion
now and again she would take her favorite book from the shelf and read to us
as we drove along, the beautiful scenery now and then attracted his attention

Synonym: occasionallyonce in a whilenow and thennow and againat timesfrom time to time