单语范例（未经PONS编辑处理）
An important facet of naval warfare are however the support ships (that is, non-combat ships): freighters, oilers, hospital ships, tugs, troop transports, and others.
en.wikipedia.org In naval warfare, the key is to detect the enemy while avoiding detection.
en.wikipedia.org Since ships in the expansion are now steam-powered, there are significant changes in naval warfare and tactics from previous games.
en.wikipedia.org Naval warfare was often crucial to military success.
en.wikipedia.org The third tier consists of the archaeology of maritime cultures, in which nautical technology, naval warfare, trade and shipboard societies are studied.
en.wikipedia.org