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The placebo proved almost as effective as morphine .

事实证明这些安慰剂几乎与吗啡同样有效。

Dr benedetti observed that morphine falls into the second category .

贝内代蒂博士注意到吗啡被分到了第二类。

He claims it is between 20 and 200 times more effective than morphine .

他称它比吗啡的镇痛效果要好20到200倍。

A 75mg daily dose of morphine would make all the difference .

若每天使用75毫克的吗啡就可以改变这一切。

Endorphines in turn are neurotransmitters that are chemically similar to morphine .

内啡肽在化学上类似吗啡，是一种神经递质。