| 单词 | sit in on |
| 释义 | sit in onphrasal verb sat in on; sitting in on; sits in on : to attend (something, such as a class or meeting) without officially participating She's been asked to sit in on the meetings. |
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英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。