He hit the other boy again and again as his friends egged him on.

他在朋友的煽動(dòng)下一次又一次地打了另一個(gè)男孩。

Its difficulties appear so great that, however hard we work, we fail again and again.

它的困難似乎如此之大,無(wú)論我們多么努力,我們一次又一次地失敗。

He would go over his work again and again until he felt he had it right

他會(huì)反復(fù)檢查自己的工作直到他認(rèn)為正確為止。