九鼎大吕: the nine big tripods which, according to legend, were cast by emperor yu and handed down from dynasty to dynasty as symbols of imperial authority, and the big bells cast in zhou dynasty --
奥秘: profound mystery; secret 短语和例子揭示大自然的奥秘 reveal [lay bare] the secrets [mysteries] of nature; 探究生命的奥秘 probe the mystery of life; 这个奥秘始终未得到解释。 the mystery was never solved
