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GRE重点词汇解析：impotent
【考法1】adj. 无生育能力的： unable to produce fruit or offspring
【例】Most mules are impotent. 绝大多数的骡子都无法生育
【近】 barren, fruitless, infertile, unfruitful
【反】 fecund, fertile, fruitful, productive高产的，硕果累累的
【考法2】adj. 无力的，无能的： lacking in power, strength, or vigor
【例】an impotent ruler who was just a figurehead 一个无能的傀儡统治者
【近】 hamstrung, handcuffed, helpless, impuissant, paralyzed, weak
【反】 mighty, potent, powerful, puissant, strong 强大的，有能力的
GRE重点词汇解析：fledgling
1) n. 新手： a person who is just starting out in a field of activity
2) young and inexperienced
Synonyms: novice, rookie, nascent, uninitiated; apprentice, beginner, freshman, neophyte, novice, tyro, recruit, rookie; fledge
fledgling <> mature, veteran
I am learning Chinese, but I’m just a fledgling speaker, having studied the language for only six months.
The fledgling mountain climber needed assistance from the more experienced mountaineers.
The course was not recommended for fledgling skiers.
At hockey he's still a fledgling and needs to work on his basic skating skills.
GRE重点词汇解析：pariah
1) an undesirable; one despised and rejected by others; an outcast;
2) a member of the lowest social caste in India
3) one that is despised or rejected : OUTCAST
4) an outcast
pariah : ostracize
pariah an outcast a rejected and despised person
pariah : contempt
PARIAH ----- an outcast, a rejected and despised person
pariah social outcast; Ex. Mariah the pariah
1. The pariahs in India comprise a caste known as “the untouchables.”
2. The soldiers returning home from the Vietnam War were treated as pariahs by much of the American public.
3. The pariah of the group sat by himself under the tree.
GRE重点词汇解析：impromptu
impromptu <> rehearsal
Her impromptu speech was well-received, giving her new confidence in her ability to speak off the cuff.
【考法1】n. 即席的表演： something, such as a speech, that is made or done extemporaneously
【近】 improvisation, extemporization
【考法2】adj. 即席的，即兴的：composedwithout previous preparation.
【例】 Our dinner guest thanked us with an impromptu song. 客人们即兴高歌一首以表达谢意
【近】 ad-lib, extemporary, improvised, offhand, unplanned, unpremeditated, unprepared, unrehearsed
【反】 considered, planned, premeditated, prepared, rehearsed 事先有所准备的
GRE重点词汇解析：ameliorate
1) pleasing to taste or smell
2) extremely pleasing to the senses, divine (as related to the gods) or delicious (n: ambrosia)
3) (食物或者气味)特别美味的：something extremely pleasing to taste or smell
ambrosial <> unsavory
ambrosial : taste
ambrosial : food
【例】The ambrosial aroma of the roast stimulated our appetites.
【近】savory, aromal, aromatic, perfumed, redolent, odorous
【反】fetid, noisome, stenchy, malodorous, rancid
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