The castle had a deep moat which emptied into the lake.
城有条很深的流入湖里的护城河。
The city is square, the fence is 12 meters or so high, build by laying bricks or stones of outside and total brick, build on the wall have crenel, there is moat outside the wall.
城为方形,墙高12米,表全部砖砌,墙上筑有垛口,墙有护城河。
Consisting of concentric circles of stone surrounded by a moat (called a "henge"), Stonehenge was constructed in several stages over thousands of years.