名词
中文翻译：替代介质
同义词：
['substitute medium', 'substitute material']
例句：
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1.The new drug is designed to replace the old one in treating cancer patients.
这种新药设计用来替代旧药治疗癌症患者。
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2. The replacement medium was used to replace the damaged part of the machine.
用替换介质来替换机器的损坏部分。
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3.The replacement medium was tested for its effectiveness before being used in the experiment.
在实验中使用之前，对替换介质进行了有效性测试。