名词中文翻译
中文翻译：初级年级
同义词：
['primary school years', 'elementary grades']
例句：
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1. The primary grades are crucial for children's development.
小学初级年级对于儿童的发展至关重要。
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2. She has been in primary grades since she was three years old.
她从三岁开始就一直在小学初级年级。
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3. The teacher explained the concepts of primary grades to the students.
老师向学生们解释了小学初级年级的概念。