名词
中文翻译：Unknown
同义词：
['tracer activity', 'tracer efficacy例句：1. The tracer activity in the sample was measured to determine its efficiency.（测量样本中的示踪剂活性以确定其效率。）2. The study focused on understanding the tracer activity in the environment.（该研究关注于理解环境中的示踪剂活性。）3. The tracer activity in the sample was measured to determine its efficiency.（测量样本中的示踪剂活性以确定其效率。）']
例句：
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1. The tracer activity in the sample was measured to determine its efficiency.
测量样本中的示踪剂活性以确定其效率。
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2. The study focused on understanding the tracer activity in the environment.
该研究关注于理解环境中的示踪剂活性。
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3. The tracer activity in the sample was measured to determine its efficiency.
测量样本中的示踪剂活性以确定其效率。