on occasion
1. 偶尔; 有时
She visits the city on occasion.
她有时到城里去。
习惯用语as occasion demands1.■遇必要时as occasion requires1.■遇必要时as occasion serves1.■一有适当的时机as occasion offers1.■有机会时, 机会到来时by occasion of1.■由于; 因为catch occasion by the forelock1.■抓紧时机seize occasion by the forelock1.■抓紧时机take occasion by the forelock1.■抓紧时机choose one's occasion1.■选择适当的时机equal to the occasion1.■临事能够应付局面for the occasion1.■临时give occasion to1.■引起; 使发生have no occasion for1.■没有...的根据; 没有必要have no occasion to (do)1.■没有...的理由[必要]if the occasion arises1.■必要的时候if the occasion should arise1.■必要的时候improve the occasion1.■抓紧时机; 利用机会说教一番on great occasions1.■在大庆[盛典]时期on occasion1.■有时; 遇必要时upon occasion1.■有时; 遇必要时on one occasion1.■曾经, 有一个时候on several occasions1.■屡次, 好几次on the first occasion1.■一有机会on the occasion of1.■在...的时候, 值此之际on the present occasion1.■当时on this occasion1.■这一次rise to the occasion1.■有应变之才take occasion to1.■抓住...的好时机, 乘机...seize occasion to1.■抓住...的好时机, 乘机...take occasion to do1.■抓住...的好时机, 乘机...seize occasion to do1.■抓住...的好时机, 乘机...