( placebo effects)
The placebo effect is the fact that some patients’ health improves after taking what they believe is an effective drug but which is in fact only a placebo.
N-COUNT : usu the N in sing
( placebo effects)
The placebo effect is the fact that some patients’ health improves after taking what they believe is an effective drug but which is in fact only a placebo.
N-COUNT : usu the N in sing
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006