炮兵火力机动 artillery fire maneuver ; Mobile artillery
炮兵火力机动的时机 artillery fire maneuver of time ; The timing of mobility artillery ; Timing of artillery maneuver
炮兵火力机动的要求 artillery fire maneuver the request ; Artillery fire tactical requirements ; The requirements of mobile artillery
可控推力火箭发动机 [航] controllable thrust rocket engine
双推力火箭发动机 Dual Thrust Rocket Motor ; Dual thrust rocket engine
火箭动力机 engine rocket
加力火箭发动机 [航] thrust-augmented rocket
双级推力火箭发动机 [航] dual thrust rocket engine
变推力火箭发动机 Variable thrust rocket engine
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.
“指挥官可以更好的指导战场上的现状，更好的用孕他们的资源，无论是在人员、火力、机动或者后勤保障上，”他说。
"The better commanders know what's happening on the battlefield, the better they can apply their resources, whether in people or in firepower or in mobility or in logistics support," he said.
在英国，重装甲保护的“步兵坦克”被用来给步兵提供机动的火力支援。而较轻型的“巡洋坦克”被用来替换已经明显过时的骑兵。
In Britain, well armored "infantry tanks" were developed to provide the infantry with mobile fire support, and lighter "Cruiser tanks" were developed to replace the obsolete Cavalry.
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