painstaking

US /ˈpeɪnzˌteɪ.kɪŋ/
UK /ˈpeɪnzˌteɪ.kɪŋ/
"painstaking" picture
1.

艱苦的, 細緻的, 煞費苦心的

done with great care and thoroughness

:
The artist made a painstaking effort to capture every detail.
這位藝術家付出了艱苦的努力來捕捉每一個細節。
It took years of painstaking research to complete the book.
完成這本書需要多年的艱苦研究。