painstakingly

US /ˈpeɪnzˌteɪ.kɪŋ.li/

UK /ˈpeɪnzˌteɪ.kɪŋ.li/

một cách tỉ mỉ

in a way that shows you have taken a lot of care or made a lot of effort:

•

She painstakingly explained how the machine worked.