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A beachhead is an area of land next to the sea or a river where an attacking force has taken control and can prepare to advance further inland. 滩头堡; 滩头阵地
The company is already in a near perfect position to take on the giants and steal market share, as it has already established beachheads in many of the 50 largest markets in the U.S., such as New York, and Los Angeles.