“不完善”的英语可以翻译为：[电] imperfection，faultiness ...

它相当不错, 但还不完善.It was quite good, but not perfect.这些晶格可能有不完善之处, 例如位错和空穴.These crystal lattices may have imperfections, such as dislocations and vacancies.语言功能的不完善使一些思想难于表达.The imperfection of language makes some ideas hard...