At the end of the study, researchers took samples again. They found hydrogen sulphide levels decreased in 80% of participants.
At the end of the study, researchers took samples again. They found hydrogen sulphide levels decreased in 80% of participants.
在研究快结束时，研究者们再次采集了样本。他们发现受试者口腔内的硫化氢含量降低了80%。