a fortified position的用法和样例：
- A fortified position offering protection from enfilading and other fire.
- A fortified position from which troops defend the end of a bridge nearest the enemy.
- The act of scaling a fortified wall or rampart.
- After praying quietly he faced his difficulties with a fortified spirit.
- A fortified enclosure for artillery on a warship.
- A fortified place or a fortress.