[ADJ-GRADED 能被表示程度的副词或介词词组修饰的形容词]不够好的；不能令人满意的；不能接受的 If you describe something as unsatisfactory, you mean that it is not as good as it should be, and cannot be considered acceptable.
The inspectors said just under a third of lessons were unsatisfactory...
督察员说只有不到1/3的课程不够好。
He asked a few more questions, to which he received unsatisfactory answers.
他又问了几个问题，得到的答案都不令人满意。
Oxford
un·sat·is·fac·tory/ˌʌnˌsætɪsˈfæktəri; NAmEˌʌnˌsætɪsˈfæktəri/adjectivenot good enough 不够好的；不能令人满意的SYN