请问subject在这句话中的意思?

问题描述:

请问subject在这句话中的意思?
All charges are subject to change without prior notice.

subject:易受...的;易患...的My mother is very subject to headaches.我母亲动不动就头痛.Japan is subject to earthquakes.日本常发生地震.The prices for steel are subject to change.钢材价格随时可能有变动.Al...