一个三角形有三面，而它是一面。
国土大致呈三角形，除位于城东南的圣彼得广场外，三面都有城墙环绕。
Peter's Square in the city of the southeast, the three sides are surrounded by walls.
位于三面环水形半岛的滨江临海城市—启东。
Shaped peninsula surrounded by water in the coastal city of Riverside - Qidong.
位于三面环水形半岛的滨江临海城市—启东。
Shaped peninsula surrounded by water in the coastal city of Riverside - Qidong.
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