know-how

n.(实际) 知识；专门技能，技巧；诀窍；方法

knock up, knock up against, knock-down, knock-kneed, knock-on, knock-out, knock-up, knockabout, knocker, knoll, knot, knot-hole, knotty, know, know about, know better than, know no bounds, know of, know sb. by name, know-all, knowing, knowingly, knowledgable, knowledge, knowledgeable, knowledgeably, known, known as, knuckle, knuckleduster, knucklehead, KO, koala, kobo, kohl, kohlrabi, kola, kook, kookaburra, kooky,