当防守方的优势火力迫使敌方广泛“掘壕”，以牺牲机动性来获得防护力时，就会发生堑壕战。
Trench warfare is resorted to when the superior firepower of the defense compels the opposing forces to "dig in" so extensively as to sacrifice their mobility in order to gain protection.
它拥有自己的专利技术和各种优势，如：令人难以置信的机动性(真正的零转弯半径)、狭小的占用空间，以及为车主人提供的极其独特的驾驶体验。
It's proprietary and full of benefits such as incredible maneuverability (true zero turning radius), a small footprint and providing a fantastically unique riding experience.
用单桅艇装备一艘只有一个水手的小船，拥有容易拉平以及在竞速时机动性强的优势。
With a small boat and one sailor, a cat rig has the advantages of being simple to trim and very maneuverable when racing.
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