Its informal conversational style would make interaction comfortable, and yet the machine would remain slightly unpredictable and therefore interesting.
出自-2013年6月聽力原文
This conversational robot companion has cameras in its eyes, which allow it to track patients and use appropriate facial expressions and body language in its interactions.
2018年12月六級真題（第二套）閱讀 Section C
柯林斯高階英漢雙解學習詞典釋義
ADJ-GRADED
會話(式)的;談話的;交談的
Conversational means relating to, or similar to, casual and informal talk.