These committees are made up of persons representing diverse interest and knowledge who volunteer to participate in coats-off,sleeves-up,pencils-out drafting sessions and committee deliberations.
參考答案:
要點：由who引導的定語從句who volunteer to participate in coats-off,sleeves-up,pencils-out drafting sessions and committee deliberations和其先行詞persons被representing diverse interests and knowing分割。定語從句子中的coats-off在這裡是說脫下外套，sleeves-up是說捲起袖子，pencils-out是說拿出鉛筆這些指開會時各人的姿態，表示在緊張工作。
譯文：這些委員會是由代表不同利益的集團和知識階層的`人組成的。這些人脫下上衣，捲起袖子，拿出鉛筆，自願參加起會議和委員會的審議工作。