English version

controlled experiment

From Longman Dictionary of Contemporary Englishcontrolled experimentconˌtrolled exˈperiment noun [countable]  TEST/EXPERIMENTa 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
Examples from the Corpus
controlled experimentThis 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.
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