no man’s land
noun/ˈnəʊ mænz lænd/
/ˈnəʊ mænz lænd/
[uncountable, singular]- an area of land between the borders of two countries or between two armies, that is not controlled by either
（边境的）无人区域；（两军之间的）无人地带 Word OriginMiddle English: originally the name of a plot of ground lying outside the north wall of the city of London, the site of a place of execution.