reward: n /V give Sth in return for good and valuable doings报答,酬谢,奖励 frustrate: Vt 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 Junior:adj.n.1. younger年轻的;地位低下的 someone who is younger年少者3. someone of lower position地位较低者;晚辈 positive:adj.1. leading to a practical action积极的, 肯定的 2.sure, having no doubt确实的,明确的 senior:adj.1.oer年老的;地位较高的2 someone who is older or of higher position年老者; 长辈;地位较高者➢ reward: n. / v. give Sth. in return for good and valuable doings 报答，酬谢，奖励 ➢ frustrate: Vt. 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 ➢ junior: adj. /n. 1. younger 年轻的；地位低下的 2. someone who is younger 年少者 3. someone of lower position 地位较低者；晚辈 ➢ positive: adj. 1. leading to a practical action 积极的, 肯定的 2. sure, having no doubt 确实的，明确的 ➢ senior: adj. 1. older 年老的；地位较高的 2. someone who is older or of higher position 年老者； 长辈；地位较高者