occur to: 發(fā)生在
An irony that did not occur to her until much later.
直到很久以后她才想到那是一件諷刺的事。
The effects of the disease are usually bilateral although they may occur to different degrees.
疾病的影響通常具有兩面性，盡管它們可能產(chǎn)生不同的影響程度。

play out: 逐漸發(fā)生; 展開; 結(jié)束
How this debate will play out in beijing remains unclear.
目前尚不清楚，中國政府將如何結(jié)束這場(chǎng)辯論。
No one can say how these two trends will play out.
沒有人能說清楚這兩種趨勢(shì)最終將是如何演繹。

engage in: 參加，忙于
They tempt you to engage in non-restful activities and keep you awake.
它們誘惑你從事不能休息的活動(dòng)讓你保持清醒。
Microsoft corp. and yahoo inc. have disclosed that they engage in some form of behavioral targeting.
微軟公司和雅虎公司也已經(jīng)透露它們從事了某種形式的行為定向的技術(shù)研發(fā)。