purity例句
9144590
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2024年06月30日 21:37:34They worried about the purity of tap water.
他们担心自来水是否纯净。
The purity of the water is tested regularly.
水的纯度定期检测。
The students are asked to prove the purity of copper.
要求学生们检验铜的纯度.
他们担心自来水是否纯净。
The purity of the water is tested regularly.
水的纯度定期检测。
The students are asked to prove the purity of copper.
要求学生们检验铜的纯度.
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