鼎鐺玉石 [ㄉㄧㄥˇ ㄔㄥ ㄩˋ ㄕˊ; ding3 cheng1 yu4 shi2] lit. to use a sacred tripod as cooking pot and jade as ordinary stone (idiom); fig. a waste of precious material casting pearls before swine ◄ ►
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