首先展示 satisfied 的词典含义。这说明,satisfied 的主语是人。搭配是 sb. is satisfied.
Satisfactory 的词典解释是 Something that is satisfactory is acceptable to you or fulfils a particular need or purpose. 这说明,satisfactory 的主语是物,固定搭配是 sth is satisfactory。主语的不同,是 satisfactory 和 satisfied最大的用法区别。