这座堡垒建于十世纪。
zhè zuò bǎolěi jiàn yú shí shìjì 。
This fortress was built in the tenth century.
士兵们在堡垒内休息。
shìbīng mén zài bǎolěi nèi xiūxī 。
The soldiers are resting inside the fortress.
堡垒的墙壁非常坚固。
bǎolěi de qiángbì fēicháng jiāngù 。
The walls of the fortress are very strong.