百度 由于大型核动力航母的价格昂贵，建造周期漫长且技术复杂，基于海军年度造舰经费和需求的限制，在冷战结束后美国海军一直只在一个财年启动一艘航母的建造项目。
SINGAPORE, Sept. 13 (Xinhua) -- China and Singapore have successfully concluded here the fifth edition of a bilateral training exercise at the Jurong Camp.
Elite Chinese and Singaporean ground forces exercised reconnaissance, encirclement and control, penetration, fire strikes, hostage rescue, and rapid evacuation in mixed task force groups during a comprehensive urban anti-terrorism drill Tuesday.
Senior officers from the two armies congratulated a successful ending of the exercise and expected more exchanges in the future.
Focusing on urban counter-terrorism operations, members of the two armies also exercised snipe, hand-to-hand combat and rappelling, among other subjects in the event.
