( septic tanks)
A septic tank is an underground tank where faeces, urine, and other waste matter is made harmless using bacteria.
N-COUNT
( septic tanks)
A septic tank is an underground tank where faeces, urine, and other waste matter is made harmless using bacteria.
N-COUNT
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006