Daily Chinese Idiom Guessing Game
Having a skill or expertise in a particular area.
技技能，本领；长擅长、长处。指有某种技能或特长。
清·郑燮《郑板桥集·家书·淮安舟中寄舍弟墨》愚兄平生漫骂无礼，然人有一才一技之长，一行一言之美，未尝不啧啧称道。”
She got the job because she had a 一技之长 in data analysis.