occasionally; from time to time
有时；偶尔
on occasion, the state was asked to intervene.
有时政府会被要求进行干预。
perform better than usual in response to a special situation or event
在特殊场合超常发挥，在特殊场合应付裕如
(archaic)make use of an opportunity to do something
(古)抓住时机
From time to time; now and then.
偶尔：间断地；不时地