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
随便看	pepper pot pepper spray peppery pep pill pep rally Pepsi pepsin pep squad pep talk peptic ulcer Pepys, Samuel per perambulate perambulation perambulator per annum percale per capita perceive percent percentage percentile perceptible perceptibly perception

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