長難句：1.The words used by the speaker may stir up unfavorable reactions in the listener which interfere with his comprehension; hence, the transmission-reception system breaks down.

結構剖析：本句有分號分為兩部分，其中第一部分的主干是 The words....may stir up unfavorable reactions....., which 引導的定語從句 which interfere with his comprehension 修飾 reactions.(這點很重要,注意理解) 過去分詞 used by the speaker 作 words 的后置定語，介詞詞組 in the listener 作 reactions 的后置定語