7. aud, audit
[L]=to hear听
在常用词audience和auditorium中，有一对同源异形词根aud和audit，其词源拉丁动词audire的意思是to hear（听）。aud是不定式词干，audit是动名词词干。
audience [aud=to hear听；-i-;-ence n.=the act or state表行为或状态→“the act or state of hearing 听的行为或状态”→] n.① interview or con-ference会见；接见：The foreign guests had an audience with the may-or.外宾拜会了市长。② the people assembled to hear听众：There will be a large audience today.今天会有很多听众来。
auditorium [audit=to hear听；-orium n.=place场所→“place for hearing听的场所”→] n.① building or room for public meetings礼堂；演讲厅② the space allocated to the hearers听众席：The author was found sitting in the auditorium.有人发现作者正坐在听众席中。
audible [aud=to hear听；-ible a.=capable of being能被……的→] a. capable of being heard听得见的：Their whispers are hardly audible.他们窃窃私语，别人听不见。
▽inaudible [in-;audible a.] a.听不见的
audit [audit=to hear听→“to hear a lecture or a report听课；听取汇报”→] v. ① attend class in a university without intending to receive a grade（在大学）旁听：to audit a history course at college旁听大学历史课程②examine（financial accounts）审查（账目）：The yearly accounts will be audited by a special committee.年度账目将由特别委员会审查。
▽auditor [audit;-or n.] n.（大学）旁听生；查账员
audition [audit=to hear听；-ion n.=the act表行为→] n. ① hearing听② trial hearing（to an actor or singer）（对演员等）试听：to give an audition to a singer听歌手试唱决定是否录用
audile [aud=to hear听；-ile a.=pertaining to……的→] a. pertaining（关于，有关）to hearing or the sense of hearing听的；听觉的：audile power听的功能
auditory [audit=to hear听；-ory a.=relating to与……有关的→] a. relating to the sense of hearing听觉的：auditory nerves听觉神经
audiology [audi=to hear听；-o-;-logy n.=branch of science一门科学→] n. the science dealing with the sense of hearing听觉学
▽audiologist [audiolog(y);-ist n.] n.听觉学学者
audio [形容词性的合词成分：aud=to hear听；-io→“of hearing与听有关的”→] I a. pertaining to sound or sound waves声音的；声波的：audio frequency音频→Ⅱ n. broadcast or recorded sound播音；录音：My television set has a good picture by weak audio.我的电视机图像清晰，但是收音不好。
练习7：
- [同义相连]根据audio的相关知识把下列英汉对等词连接起来。
① audiometer a.测听术
② audio-visual b.音频
③ audiophile c.听力计
④ audiometry d.音响效果爱好者（发烧友）
⑤ audio-frequeny e.视听教学的
- [由此及彼]
① earphone是耳机，telephone是电话，audiphone是什么？
② typist是打字员，被称为audiotypist的人，打字技术如何？
- [寻根问底]指出下列单词的词根并领会其词义的由来。
① auditress n.女审计员
② auditorial a.审计的；审计员的
③ subaudition n.领会到的言外之义（提示：sub-=under）
④ audion n.三极真空管