Constant criticism is enough to demoralize anybody.

　　頻繁的批評足以使任何人意志消沉。

　　His moving speech was enough to carry the audience.

　　他感人的演講足以贏得聽眾的支持。

　　I am old enough to remember the War, but only just.

　　我這個年齡足以記住那場戰爭，不過只是勉強記得。