moat
In ancient times
Many cities are covered on the banks of the river.
Use the suspension bridge to get in and out of the city above the river
Use the river to defend the city
The moat
With a moat
It will become more difficult to attack the city.
Because the river is under the wall
To build a bridge on the river,
Will be heavy casualties
So the moat was in ancient times,
Is a very effective and honest facility
護城河
在古代
許多城池是蓋在河岸邊的
在河的上面使用吊橋來進出城市
利用河來防禦城市
這種情況便稱之為護城河
有了護城河
要攻打城市就變得更加的困難
因為城牆下是河流
要在河上搭好便橋,
將會傷亡慘重
所以護城河在古代,
是很有效的守誠設施
