1.

2.

1. 滩头阵地；登陆场；滩头堡
    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.

1. an initial accomplishment that opens the way for further developments

    e.g. the town became a beachhead in the campaign to ban smoking outdoors
           they are presently attempting to gain a foothold in the Russian market

    Synonym: foothold

2. a bridgehead on the enemy's shoreline seized by an amphibious operation

    e.g. the Germans were desperately trying to contain the Anzio beachhead