fulfill :vt.履行,实现,完成(计划等)(To bring into actuality; effect;to carry out; to complete)

　　如fulfilled their promises/plans.

　　realize:vt.认识到,了解,实现(To make real; similar to fulfill)

　　He finally realized his lifelong ambition to learn how to play the violin.他最终实现了他毕生的理想——学会了拉小提琴

　　我猜大概是realize倾向于实现梦想一类的东东,fulfill强调实现或完成某项任务或计划.

　　另外realize“认识到,了解”之意是fulfill不具备的.fulfill的“履行,完成”之意也是realize不具备的.

　　你还是查下英英字典吧.

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标签：实现in完成履行具备