道山學海 [ㄉㄠˋ ㄕㄢ ㄒㄩㄝˊ ㄏㄞˇ; dao4 shan1 xue2 hai3] mountain of Dao, sea of learning (idiom); learning is as high as the mountains, as wide as the seas ars longa, vita brevis ◄ ►
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