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3.surface.. n/v表面; 4.commerce. u商业/贸易; 5.consequence. pl结果;u重要性; 6.profile. n.侧面;v从侧面看; 7.investigation. n调查; 8.reliability. u.可靠(性); 9.expedition. n探险、考察; 10.sample. n样/标本; 11.classification. u.分类;c种类; 12.analysis. n.分析; 13.volume. c.卷、册; 14.course. n.课程、航线;过程 15.credit. n.学分; 16.semester. n.学期; 17.strain. n.压力、拉紧; 18.pressure. u.压力; 19.enthusiasm. u.热情(for/about sth); 20.discipline.u纪律，c学科; 21.authority. n权力/威; 22.explanation.n解释=interpretation; 23.forenoon=morning; 24.monologue. n 独白; 25.cycle.n周期; 26.yawn.n.哈欠; 27.temper. n.脾气; 28.personality. c.个性; 29.reasoning. u.推理; 30.shortage.n.不足; | 
