LEARNit Dictionary
controlled experiment
noun
/kənˌtrəʊld ɪkˈsperɪmənt/
UK
/kənˌtrəʊld ɪkˈsperɪmənt/
US
1
a scientific experiment in which only one condition is changed in each of several tests in order to find out what effect that condition has on the results of the experiment
آزمایش کنترلشده, آزمایش علمی تحت کنترل