近日，北部战区海军某潜艇支队组织潜艇开展跨昼夜实战化训练，提升官兵作战能力。（英文中国军网、英文国防部网/吴浩东 摄影报道）
A submarine attached to a submarine flotilla with the navy under the PLA Northern Theater Command steams in the company of a towboat during a recent day-and-night maritime combat training exercise. (eng.chinamil.com.cn/Photo by Wu Haodong)