She filed the rough edges off her nails with a nail file.她用指甲锉把指甲粗糙的边角锉掉。Even the smallest metallic object, whether a nail file or cigarette lighter, is immediately confiscated.即便是最小的金属物件，不管是指甲锉还是打火机，都要立即没收。She sneaked a nail file out of her purse.她悄悄地从提包里拿出一把指甲锉。