单语范例（未经PONS编辑处理）
This type of split gate has no doors and provides no real defensive purpose but narrowing the passage.
en.wikipedia.org Stout gives several examples to indicate their symbolic importance simply due to their impracticality as defensive structures.
en.wikipedia.org This narrowness of the entrance may be for defensive purposes.
en.wikipedia.org He's been known to play as a defensive midfielder.
en.wikipedia.org The entire village was reinforced with a solid wall stretching 450 metres around the village complete with two defensive towers.
en.wikipedia.org