on occasion (或 occasions)

occasionally; from time to time

有時(shí)；偶爾

on occasion, the state was asked to intervene.

有時(shí)政府會(huì)被要求進(jìn)行干預(yù)。

rise to the occasion

perform better than usual in response to a special situation or event

在特殊場合超常發(fā)揮，在特殊場合應(yīng)付裕如

take occasion

(archaic)make use of an opportunity to do something

(古)抓住時(shí)機(jī)

on occasion

From time to time; now and then.

偶爾：間斷地；不時(shí)地