形容词
中文翻译：补充的
同义词：
['additional', 'supplementary', 'auxiliary']
例句：
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1. Theteacher provided supplementary materials to help the students understand the concept better.
老师提供了额外的材料来帮助学生更好地理解这个概念。
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2.The company offers supplementary insurance coverage for its employees.
该公司为员工提供额外的保险覆盖。
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3.The student needed additional time to complete his homework.
这个学生需要额外的时间来完成他的家庭作业。