形容词
中文翻译：Unknown
同义词：
['subordinate', 'secondary', 'tertiary', 'subordinate', 'secondary']
例句：
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1. The second-grade students are preparing for the upcoming exams.
二年级的学生正在为即将到来的考试做准备。
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2. The secondary school has a large student body and a wide range of courses.
这所中学学生众多，课程种类丰富。
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3. The secondary market is where products are sold that are not on the primary market.
次级市场是指不在主要市场上销售的产品。