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21, augment vt.vi.n. 增加,增大 vt.增加, 提高, 扩大 He augments his income by teaching in the evening. 他通过晚上教书来增加收入。 22, authentic a. 真实的,可靠的,可信的 The copy he made of the painting can pass for an authentic one. 他临摹的画足以乱真。 This is an authentic news report.We can depend on it. 这是篇可靠的资讯报道, 我们相信它。 23, avail vt.有益于 n.效用 We tried to keep him alive but to no avail. 我们全力抢救他, 但却徒劳无功。 All his efforts did not avail. 他做的所有的这些努力都是没有用的。 24, avert vt. 转开,避免,防止 He managed to avert suspicion. 他设法避嫌。 She averted her eyes from the terrible sight. 她把目光转开, 不敢去看那可怕的景象。 25, baffle vt.使挫折 n.迷惑 The question baffled me completely and I couldnt answer it. 这个问题把我彻底难倒了, 我答不出来。 26, barren a.贫瘠的;不妊的 The barren land could produce little food. | 
