地势险要，为关隘重地。
因地势险要，素有“两京锁钥无双地，万里长城第一关”之称。
Due to difficult terrain, known as "two lock and key unparalleled in Beijing, the Great Wall the first hurdle," said.
北京地处华北平原北部的边缘，背山面海，地势险要，古称神京。
Lying on the northern edge of the north China Plain behind mountains and facing the sea in front. Beijing has a strategic geographical location and it was called ShenJing in ancient times.
张北县地处河北省西北部，内蒙古高原南缘的坝上地区地势险要，气候独特。
Zhangbei County in Hebei Province is located in the northwest, the southern edge of Inner Mongolia plateau of Bashang region strategically located and difficult terrain, climate unique.
张家口市因地处北京与大西北、内蒙的交通要冲，地势险要，历来为兵家必争之地。
Because of northwest of Beijing and in zhangjiakou, Inner Mongolia, the traffic is very dangerous, always terrain which.
在瑞士，虽有身体健全的男性都要服兵役。兵役的时间为10个月，包括要在地势险要的地形上，进行各种专业的训练。
All able-bodied Swiss men must perform military service, which lasts about 10 months and frequently includes specialist training in rugged terrain.
在瑞士，虽有身体健全的男性都要服兵役。兵役的时间为10个月，包括要在地势险要的地形上，进行各种专业的训练。
All able-bodied Swiss men must perform military service, which lasts about 10 months and frequently includes specialist training in rugged terrain.
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