名词
中文翻译：Unknown
同义词：
['score cleaner', 'grade cleanser']
例句：
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1. The grade washer is designed to help students improve their grades.
成绩洗涤器旨在帮助学生提高成绩。
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2. The teacher used the grade washer to highlight areas where students needed improvement.
老师使用成绩洗涤器来强调学生需要改进的地方。
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3. The grade washer has become a popular tool for parents who want to monitor their children's academic progress.
成绩洗涤器已成为家长监控孩子学业进步的热门工具。