名词
中文翻译：外部附加物
同义词：
['outer part', 'external component', 'outer element']
例句：
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1. The outeraddendum of the book is a map of the city.
这本书的外部附件是一张城市地图。
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2. The engineer added an outer addendum to the design to improve its durability.
工程师在设计中增加了一个外部附件，以增强其耐用性。
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3.The outer addendum was made from wood and painted with a vibrant red color.
外部附件由木材制成，并涂有鲜艳的红色。