THE BASIC CAUSES of most cases of halitosis are now fairly well understood.
THE BASIC CAUSES of most cases of halitosis are now fairly well understood.
目前对大多数口臭的基本成因知道得还满清楚。
THE BASIC CAUSES of most cases of halitosis are now fairly well understood.
目前对大多数口臭的基本成因知道得还满清楚。