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骊：古指黑龙。在骊龙的颔下取得宝珠。原指冒大险得大利。后常比喻文章含义深刻，措辞扼要，得到要领。
[write and bring out important points from a mass of facts as one who plucks a pearl from the black dragon] 比喻做文章扣紧主题、抓住要领(骊:黑龙)
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