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GMAT核心词汇 urbane
英文解释: adjective: showing a high degree of refinement and the assurance that comes from wide social experience
例句: Because of his service as an intelligence officer and his refined tastes, W. Somerset Maugham became the inspiration for the urbane and sophistcate spy James Bond.
GMAT核心词汇 vacillate
英文解释: verb: be undecided about something; waver between conflicting positions or courses of action
例句: Some students vacillate between schools when deciding which to attend, while others focus only on one school.
GMAT核心词汇 vacuous
英文解释: adjective: devoid of intelligence, matter, or significance
例句: To the journalist's pointed question, the senator gave a vacuous response, mixing a few of his overall campaign slogans with platitudes and completely avoiding the controversial subject of the question.