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The cannons on your watchtowers be twice as powerful .

了望塔上的大炮强大的两倍。

On the top of the wall there was space for soldiers to march and there were watchtowers .

在长城之上，有供士兵行进的空间，还有了望台。

Every few hundred meters along the wall there are watchtowers , where soldiers used to keep watch .

沿城墙每隔几米就有一个烽火台，过去常有士兵驻守。

In some places there are watchtowers on the beaches topeople sharks in the water .

有些地方在沙滩上建起了望塔，提醒人们水中有鲨鱼。

It might be wise building more to middle so you can put watchtowers there .

也许在中间多建一些建筑是明智的，这样你就可以直接在那里放置望塔了。