有一天，当一切看上去都不可能时，智秀发现庆民身上有着可以改变她一生的秘密。

But one day, when all seems lost, Ji-soo is utterly shocked when she realizes that Gyung-min carries a secret that will change her life forever.

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王战，孟庆任，解建民。1999。黄骅坳陷地区地质构造演化和油气分布。北京：科学出版社，115。

Wang Zhan, Meng Qingren and Jie Jianmin. 1999. Geology structural evolution and distribution of oil and gas in Huanghua depression. Beijing: Science press, 115.

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