challenging[5tFAlindViN] adj. 1.具有挑战性的：His new book is full of challenging ideas. 他的新著作充满挑战性观念。2.有吸引力的：She’s a challenging woman, isn’t she? 她真是一个有吸引力的女人，不是吗？

champion[5tFAmpjEn] n. [C]冠军，优胜者：the boxing champion of the world 世界拳击冠军

【说明】指参加比赛获得冠军的人或队，不指“冠军地位”、“冠军称号”，表示后者要用championship：The championship is ours. 冠军是我们的(即冠军属于我们)。

chance[tFB:ns] n. 1.[C,U]机会，运气：I wish to have a chance to go [of going] to college. 我希望有个机会上大学。/ Chance plays an important part in many card games. 在许多牌赛中运气很重要。2.[C,U]可能性：She has a good chance (not much chance) of winning. 她大有希望(没什么希望)获胜。/ There is a chance that I will see him these days. 这几天我有可能见到他。v. 冒…的险，试试看：I don’t know if we can get it, but let’s chance it. 我不知道能不能成功，不过我们试试看吧。/ She chanced to be in when he called. 他打电话时碰巧她在。■1. by chance 偶然，意外地：I met her quite by chance. 我遇见她完全是偶然的。2. take chances 冒险：You should never take chances when driving a car. 开车时绝不要冒险。

change[5tFeindV] n.1.[U]零钱，找头：Don’t forget your change! 不要忘了找你的钱！2.[C,U]变化，改变，变动：There is a sudden change in the situation. 形势突然发生变化。3.[C]更换，交换；换车，转车：Don’t forget to take a change of clothes. 别忘了带一套换洗的衣服。/ He had to make a quick change at Crewe. 他得在克鲁迅速换车。v. 1.改变，变化： At this restaurant they change the menu every day. 这个饭馆天天换菜单。2.更换，交换，兑换：Why does it take women so long to change a dress? 为什么女人换一件衣服要这么久? / Shall we change seats? 我们换换座位好吗？■1. change...for… 用…去换…：You’d better change that shirt for a large one. 你最好把那件衬衣去换件大号的。2. change...into… 把…变成(换成)…：We can change ice into water by heating it. 通过加热我们可以把冰变成水。3. for a change 为了改变一下，换换花样：Let’s go to a restaurant for a change. 我们换个花样，去餐馆吃一顿吧。

【说明】change sth与change sth for sth不同，前者指换某物，后者指用某物去换另一物，如“这部照相机不够好，我想换一部”，译成英语是The camera isn’t good enough; I want to change it (for another)，而不能是The camera isn’t good enough; I want to change another.

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