2011年10月12日 11时02分，《英语网:2011下半年英语四级考试写作必备词汇[1]》由出国留学网liuxue86.com英语编辑整理.
der to study its nature or structure
annual adj. happening every year
anticipate v. expect
apparent adj. clearly seen or understood; obvious
append v. ~ sth （fml ） attach or add sth （esp in writing）
appreciate v. understand and enjoy （sth）; value highly
approach v. come near or nearer to in space or time
appropriate adj. ~ suitable; right and proper
approximate adj. almost correct or exact but not completely so
arbitrary adj. based on personal opinion or impulse， not on reason
area n. extent or measurement of a surface
aspect n. particular part or feature of sth being considered
assemble v. come together; collect
assess v. ~ sth decide or fix the amount of sth
assign v. ~ sth to sb give sth to sb as a share of work to be done or of things to be used
assist v. ~ in/with sth; ~ （sb） in doing sth （fml ） help
assume v. accept as true before there is proof
assure v. tell （sb） positively or confidently
attach v. ~ sth fasten or join sth （to sth）
attain v. succeed in getting （sth）; achieve
attitude n. ~ way of thinking or behaving
attribute v. ~ sth to sb/sth regard sth as belonging to， caused by or produced by sb/sth
author n. writer of a book， play， etc
authority n. power to give orders and make others obey
automate v. cause to operate by automation
available adj. that can be used or obtained
aware adj. ~ of sb/sth; ~ that.。。 having knowledge or realization of sb/sth
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