| ประโยคภาษาจีน : 中文句子 | 
|---|
|  ér而  zài在  duì zhào对照  rì zhōng日中  tā men他们  shí yòng食用  de的  hùn hé wù混合物  zhōng中  cún yǒu存有  zhèng cháng正常  hán liàng含量  de的  sè ān suān色氨酸 | 
| On the placebo day, they were given the same mixture but with a normal amount of tryptophan. |