名词中文翻译
中文翻译：低等级
同义词：
['low-grade', 'low-level']
例句：
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1. The students in the lower gradesare still learning basic skills.
低年级的学生还在学习基本技能。
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2. The company has introduceda new product with a low grade ofquality.
公司推出了一款质量较低的新产品。
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3. Theresearch team conducted a study on low-grade wastewater treatment.
研究团队对低级别废水处理进行了研究。