名词
中文翻译：Unknown
同义词：
['chemical reagent', 'chemical analyzer', 'chemical standardizer']
例句：
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1. The lab technician needs to use CCA to clean the glassware.
实验室技术人员需要使用CCA来清洗玻璃器皿。
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2.The scientist used a CCA to detect the presence of lead in the water sample.
科学家使用CCA来检测水样中铅的存在。
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3. The engineer was tasked with calibrating the CCA for the new machine.
工程师被指派为新机器校准CCA。