descendant 英 [dɪˈsendənt] 美 [dɪˈsendənt] n. 后裔，子孙；（由过去类似物发展来的）派生物；（机器等）后继型产品 adj. 下降的；祖传的
考点1: n.后代: one deriving directly from a precursor or prototype
■e.g. They are descendants of the original English and Scottish settlers他们是最早一批英格兰和苏格兰定居者的后裔。
■反: forbears袓先
dandy 英 [ˈdændi] 美 [ˈdændi] n. 好打扮的男子；花花公子；华丽物品，极品；登革热 adj. 上等的，极好的；服装华丽的；与花花公子有关的
考点1: n.纨绔子弟，爱打扮的人: a man who gives exaggerated attention to personal appearance
■e.g. That was a dandy of a game 那是纨绔子弟的游戏。
■同: fop, gallant
考点2: adj.最佳最好的: of the very best kind
■e.g. that's a dandy new racing bike 真是辆最好的比赛用自行车
■同: awesome, fabulous, superb, sensational, splendid, unsurpassed
■反: atrocious, awful, execrable, lousy, pathetic, wretched
haven 英 [ˈheɪvn] 美 [ˈheɪvn] n. 保护区，避难所；港口 v. 为……提供避难所
考点1: n.安全的地方: a place of safety
■e.g. a haven for artists艺术家们的圣地
■同: asylum, harbor, refuge, retreat, sanctuary
■反: unsafe place, dangerous place 不安全的地方
barricade 英 [ˈbærɪkeɪd; ˌbærɪˈkeɪd] 美 [ˈbærɪkeɪd] n. 街垒；路障；争论之处 vt. 设路障；阻碍
考点1: n.障碍物: an obstruction or rampart thrown up across a way or passage
■e.g. The police put up barricades to block off the parade route警察设立了路障来阻挡游行的队伍
■同: fence, hedge, wall, barrier, obstacle, blockade, obstruction
考点2: v.用障碍物阻止通过: to prevent access to by means of a barricade
■e.g. 【例】streets have been barricaded by authorities 街道被当局封锁了
■同: bar, check, hinder, impede, obstruct, wall off
■反: permit 允许
screen 英 [skriːn] 美 [skriːn] n. 屏，幕；屏风 vt. 筛；拍摄；放映；掩蔽 vi. 拍电影
考点1: n.掩护物，屏障: something that shelters, protects, or hides
■e.g. The target will be difficult to reach as it is behind a screen of anti-aircraft batteries.目标在防空炮火的掩护之下难以靠近。Please keep away from the screen door. 请不要倚靠屏蔽门。
■同: aegis, ammunition, armor, cover, guard, protection, safeguard, security, shield, wall, ward
考点2: vt.保护，使…免受攻击: to drive danger or attack away from
■e.g. Gunships were called in to help screen the troops from further attacks. 武装直升机被呼口叫对步兵进行支援，使之免受进一步的攻击。
■同: defend, fence, fend, forfend, protect, secure
■反: assail, assault, attack 攻击
考点3: vt.掩护，遮蔽: to keep secret or shut off from view
■e.g. Bushes screened the swimming pool from passersby on the street.灌瞿木丛将各游泳池和外面的行人隔绝
开来。
■同: belie, cloak, conceal, curtain, disguise, enshroud, mask, obscure, occult, shroud, veil
■反: disclose, expose, reveal, uncloak, uncover, unmask, unveil 揭露
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