Buth布特butconj.但是prep.除 ... 以外adv.仅仅；只pron.无不butyirc acid丁酸But why?butazolamine丁唑酰胺butenylidyne次丁烯基butinazocine布替佐辛(镇痛药)buty lactate[机] 乳酸丁酯butriptyline布替林butyrolactam丁内酰胺butanolamine丁醇胺Butyrospermum牛油树