名词
中文翻译：上等年级
同义词：
['higher grades', 'upperclass', 'senior years例句：1. The school offers a range of extracurricular activities for upper grades students.（学校为高年级学生提供一系列课外活动。）2. The teacher noticed that the upper grades were performing better than the lower ones.（老师注意到高年级的学生表现比低年级的要好。）']
例句：
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1. The school offers a range of extracurricular activities for upper grades students.
学校为高年级学生提供一系列课外活动。
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2. The teacher noticed that the upper grades were performing better than the lower ones.
老师注意到高年级的学生表现比低年级的要好。
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3. The upper grades have been given more challenging assignments to prepare them for college.
高年级的学生被给予了更具挑战性的作业，以帮助他们为大学做好准备。