vt.& vi.打，打击；碰撞； vt.击（球）；（在精神上）打击（某人）；猜中；迎合； n.打，打击；碰撞；（演出等）成功；批评，讽刺； vi.（风暴、疾病等）袭击；抨击；（偶然）碰上；（突然）想到（与 on, upon 连用）；
(1) The primary aim of this course is to improve your spoken English. (2) Our primary concern must be the children. (3) Good health care is of primary importance.
(1) The principal reason for this omission is lack of time. (2) New roads will link the principal cities of the area. (3) Peter Brown, principal of St John's college
(1) What do you like to do in your spare time? (2) This was obviously a reasonable suggestion; it doesn't, however, find favor with the men. (3) The new teacher finds favor in the eyes of the parents.
(1) Have you observed any changes lately? (2) All the characters in the novel are closely observed (= seem like people in real life) . (3) The police observed a man enter the bank.
observe [əbˈzə:v] 📢 UK📢 US
adj.健康的；健全的；大量的；有益于健康的；
vt.& vi.观察；研究； vt.遵守；观察；庆祝； vi.注意；说；评述；当观察员；
adj.不间断的；不停的；多次重复的；频繁的；
n.州长；执行吏；治安官；
(1) They have arrested a number of leading opposition politicians. (2) That politician is always triming. (3) The politician defected from his own party and joined the opposition.
politician [ˌpɒləˈtɪʃn] 📢 UK📢 US
n.宝石，宝石饰物；受珍视的人[物]；宝贝，手表的宝石轴承；
n.例外，除外；反对，批评；[法律]异议，反对；
n.进攻；（球队的）前锋；进攻方法；攻势；
n.政治家；政客，玩弄权术者；<蔑>政客，<美>政治贩；
(1) You are capable of better work than this. (2) She's a very capable teacher. (3) I'll leave the organization in your capable hands.
capable [ˈkeɪpəbl] 📢 UK📢 US
n.衣服；服装； v.给…穿衣服；
adj.能干的；有才能的；有才华的；能胜任的； n.有才能的，能干的；
n.行为；行动；<律>契约；证书； v.立契转让；
adj.明显的；显著的；平淡无奇的；自明；
(1) He declared that he was in love with her. (2) Few people dared to declare their opposition to the regime. (3) She declared herself extremely hurt by his lack of support.
(1) to offer interest-free credit (= allow sb to pay later, without any extra charge) (2) We bought the dishwasher on credit . (3) to get/refuse credit
(1) We discerned the figure of a man cling to the mast of the wrecked ship. (2) The mast went in the storm. (3) It was a day of national mourning with flags flying at half mast everywhere.
mast [mɑ:st] 📢 UK📢 US
n.五金器具；计算机硬件；武器装备；
n.桅杆；栓柱；橡树果实； vt.在…上装桅杆；
vt.祝福；保佑；赞美；为…祈福；
n.情感，感情；情绪；感动，激动；
(1) For ten years she dwelled among the nomads of North America. (2) So you made a mistake, but there's no need to dwell on it. (3) I'd rather not dwell on the past.
dwell [dwel] 📢 UK📢 US
vi.居住；存在于；细想某事；
n.安全；保证，担保；保护，防护；有价证券； adj.安全的，保安的，保密的；
adj.巨大的；庞大的；极恶的；凶暴的；
n.娱乐，消遣；招待，款待；娱乐节目；
(1) These pets require a lot of care and attention. (2) This condition requires urgent treatment. (3) Do you require anything else? (= in a shop/store, for example)
(1) Many dogs have suffocated in hot cars. (2) The couple were suffocated by fumes from a faulty gas fire. (3) He put the pillow over her face and suffocated her.
(1) [不可数名词]to check the effectiveness of the security system (2) I admire the effective use of colour in her paintings. (3) the effective, if not the actual, leader of the party
effective [ɪˈfektɪv] 📢 UK📢 US
adj.女性的；雌性的；能结果实的；电气设备阴的； n.女人；雌性动物；雌性植物，雌株；
adj.有效的；起作用的；实际的，实在的；给人深刻印象； n.[军]现役兵额，有生力量，精兵；
n.宫，宫殿；（主教）邸宅，宏伟大厦；华丽的娱乐场所；
adj.美味的，可口的；有趣的；；喷香；
(1) He spent the whole day writing. (2) We drank a whole bottle each. (3) The whole country (= all the people in it) mourned her death.
(1) He fluttered his hands around wildly. (2) She fluttered her eyelashes at him (= tried to attract him in order to persuade him to do sth) . (3) The butterfly fluttered from flower to flower.
(1) All donations will be gratefully received. (2) He nodded gratefully. (3) I would be grateful if you could send the completed form back as soon as possible.
grateful [ˈgreɪtfl] 📢 UK📢 US
adj.感激的，感谢的；令人愉快的；宜人的；荷；
n.勇敢，勇气；辉煌，华丽；刚毅；
n.鼻孔；鼻孔内壁；
adj.可爱的；令人愉快的；亲切友好的；慷慨大方的； n.美女，美人，佳人；漂亮的东西；
(1) Stop biting your nails! (2) nail clippers (3) She hammered the nail in.
(1) He looked at himself in the mirror . (2) a rear-view mirror (= in a car, so that the driver can see what is behind) (3) (British English)a wing mirror (= on the side of a car)
mirror [ˈmɪrə(r)] 📢 UK📢 US
vt.欠…债；感激；应归功于；怀有情感；
vt.使有资格；给…定名；给与…权利；称做；
n.小心，谨慎；劝告，警告；〈英〉担保；〈口〉须警惕的事或人； vt.警告；劝告；
n.镜子，反光镜；真实的写照；反映，借鉴；榜样； vt.反映；反射；
(1) a hunting lodge (2) All visitors should report to the porter's lodge. (3) a masonic lodge
(1) Do not disturb (= a sign placed on the outside of the door of a hotel room, office, etc.) (2) She awoke early after a disturbed night. (3) Don't disturb the papers on my desk.