茫无涯际

Explanation: The vast vast and without marginal. Also as "indiscriminate and marginal." 　　Source: Qu "<Hungry Country and Records> Postscript": "Fortunately now renowned lighthouse in the heart of the sea, although the only ray of red light, according to micro-faint, barely discernible Mang finally able to inter the future knows no boundaries." 　　Examples: This is a stand alone among the small islands in the sea, surrounded by the sea and the sky is ~. ★ MK Cheng, "Night Fishing in mind"