名词中文翻译
中文翻译：副级
同义词：
['subordinate', 'lower grade']
例句：
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1. Thesubgrade students are still struggling to keepup with the upper graders.
低年级学生仍然在努力跟上高年级学生。
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2.The subgrade teachers were surprised by thehigh standard of the upper graders.
低年级教师对高年级学生的标准感到惊讶。
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3. The subgrade students are given extrahelp in math and science.
低年级学生在数学和科学上获得额外的帮助。