单词	controlled experiment
释义	controlled experimentconˌtrolled exˈperiment noun [countable] Examples EXAMPLES FROM THE CORPUS This has not yet been measured by a properly controlled experiment. Two of the four specimens known to be infected with M tuberculosis were positive in the controlled experiment. a scientific test done in a place where you can control all the things that might affect the test:  a controlled experiment to determine the effects of light on plant growth
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