hollow out

• • 挖空；使成凹形：

    He hollowed out a log and made it into a boat.

    他把原木挖空，制成了小船。

  • 挖成，挖出：

    Man foxholes were hollowed out by the soldiers before fighting.

    战斗打响之前，士兵们挖出许多个人掩体。