形容词
中文翻译：额外的
同义词：
['added', 'additional', 'supplementary例句：1. We need to add an extra pair of shoes to our shopping list.（我们需要在购物清单中增加一双鞋。）']
例句：
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1. We need to add an extra pair of shoes to our shopping list.
我们需要在购物清单中增加一双鞋。
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2.The teacher added some interesting facts about the history of the country to the lesson.
老师在课上增加了一些关于该国历史的有趣事实。
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3.The company decided to add a new product line to its range of goods.
公司决定在其商品系列中增加一个新的产品线。