painstakingly
/ˈpeɪnzteɪkɪŋli/
📚
14361
GRE
with great care and thoroughness极其仔细地，一丝不苟地
adverb [关系副词] 煞费苦心地；费力地
The cause they contrived so painstakingly also ended in failure. 他们惨淡经营的事业也以失败而告终。
