rewardvt. n. 奖赏；回报rewardinga. giving sb. satisfaction, pleasure, or profit 值得做的，有益的，有意义的frustratevt. 1. cause sb. to have feelings of disappointment 使沮丧，使灰心2. cause the failure of sth. 使挫败，使受挫折juniora. having a low position, level, or rank (地位、水平、层次)较低的n. 1. C sb. who is younger 年少者2. C sb. of low or lower position (地位或等级)较低者；晚辈positivea. 1. helpful and encouraging in achieving sth. 积极的2. definite; allowing no room for doubt 确实的，明确的seniora. having
