地势险要的关口、通道 place difficult of access ; strategic pass
地势险要的关口 place difficult of access ; strategic pass
地势险峻而正当要冲 strategically located and difficult of access
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.
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