完善 (wán shàn) means “(of systems, facilities etc) comprehensive; well-developed; excellent; to refine; to improve”. It is an HSK 5 Chinese word in the HSK 3.0 vocabulary.
经过多次修改完善这份报告已经比较完整了。
Jīngguò duō cì xiūgǎi wánshàn zhè fèn bàogào yǐjīng bǐjiào wánzhěng le.
After multiple revisions, this report has become relatively complete and perfect.
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