vassalage的用法和样例：
例句
用作名词 (n.)
- He brought the areas still nominally under Assyrian vassalage firmly under subjection, deporting populations in the north to far-off places.
他使那些地区变得有名无实，加固了亚述隶属地区的控制，把北方的人口驱赶到遥远的地方。
