形容词
中文翻译：次要的
同义词：
['subordinate', 'secondary', 'tertiary']
例句：
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1. The secondary school students arepreparing for the entrance exam.
中学生正在准备入学考试。
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2. The secondary structure of a sentenceis its hierarchical arrangement ofwords.
句子的二级结构是其单词的层次排列。
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3. The secondary industry is themanufacturing sector.
次级产业是指制造业。