zhè / ge / wáng / cháo / zài / jiāng / yù / zuì / dà / guó / lì / zuì / qiáng / de / shí / qī / dá / dào / jí / shèng

这个王朝在疆域最大、国力最强的时期达到极盛。

This dynasty reached its height when its territory was largest and its national power was strongest.