He must know best, of course; but it does seem very hard that that very thing should happen to them.

当然，人，应该明通透，不过，不可事恰恰发生自己身上，怎，这道关隘始终难以超越。

You have to go through particular passes and the Dacians mount ambushes.

你必须经过特定关隘，而达契亚人会设下埋伏。