<p class="ql-block"><b>《红宝书考研英语》为考研助力！红宝书·为考研的同学整理解析历年考研真题中的长难句。</b></p><p class="ql-block"><b>He helped popularize the idea that somediseasesnot previously thought to have a bacterial cause were actually infections, whicharoused much controversy when it was first suggested.</b></p><p class="ql-block"><b>词汇突破</b></p><p class="ql-block">bacterial [bækˈtɪriəl]</p><p class="ql-block">adj. [微] 细菌的</p><p class="ql-block">infection [ɪnˈfekʃn]</p><p class="ql-block">n. 感染；传染；影响；传染病</p><blockquote>结构分析本句的主干是 He helped popularize the idea。that 引导的是同位语从句，解释 the idea，说明 idea 具体内容。not previously thought to have a bacterial cause 是过去分词短语作 some diseases 的定语。which引导非限定性定语从句，修饰 the idea，其中 when 引导的是时间状语从句，修饰全句。</blockquote><p class="ql-block"><br></p>