Explanation: Clever way to pass on to others. Usage: The main predicate; as predicate, object, attribute; used to describe the superb skill to teach others Source: Element to a good question "Poems" Poem: "do not teach mandarin duck embroidered look, Do not make lily degree and people." Examples: Live can be used for ~ pen. (Lu Xun's "Supplement to nostalgic collection of _set_")