形容词
中文翻译：补充的
同义词：
['additional', 'supplementary']
例句：
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1. The teacher provided additional explanations to clarify the concept.
老师提供了额外的解释来澄清这个概念。
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2. The company offers a supplementary insurance plan for its employees.
该公司为员工提供一项附加保险计划。
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3. The student needed supplementary help to pass the exam.
学生需要额外的帮助才能通过考试。