1.participate in 參加,分享
例句:Those numbers tell you something about aggregate activities, but why do individuals participate in this in the first place?
以上這些數字反映的都是群體活動,但一開始個人為什么會參加這類活動呢?
2.step up to 走近,接近
例句:However, at the application architecture level, you have to step up to another level.
不過,在應用程序架構級別,必須上升到另一個層次考慮問題 。