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;