translation.en: So we know that our beliefs and expectations can be manipulated, which is why we do trials where we control against a placebo -- where one half of the people get the real treatment and the other half get placebo.
translation.zh: 我们知道我们的信念和期待 是可被操纵的 这就是为什么试验上 需要安慰剂对照组－ 这样一半人接受真正的治疗 一半人得到安慰剂