painstaking
adjective uk/ˈpeɪnzˌteɪ.kɪŋ/ us/ˈpeɪnzˌteɪ.kɪŋ/
认真仔细的，精心的，费尽心思的
extremely careful and correct, and involving a lot of effort
It took months of painstaking research to write the book. 这本书是经过好几个月的苦心研究才写出来的。
He was described by his colleagues as a painstaking journalist. 同事们都说他是一名认真而严谨的记者。
Synonyms: carefulconscientiousmeticulous scrupulousthorough (CAREFUL)