perforation

n. 穿孔,贯穿,贯通

peremptory writ, perennial, perennially, perestroika, perfect, perfect pitch (also absolute pitch), perfectibility, perfectible, perfection, perfectionism, perfectionist, perfectly, prefer sb to do sth., perfervid, perfidious, perfidiously, perfidiousness, perfidy, perforate, perforating, perforce, perform, performance, performer, performing arts, perfume, perfumed, perfumer, perfumery, perfunctorily, perfunctoriness, perfunctory, pergola, perhaps, peri-, perigee, perihelion, peril, perilous, perimeter,