extraction
noun uk/ɪkˈstræk.ʃən/ us/ɪkˈstræk.ʃən/
[ U ]（尤指用力的）拔出，提取
the process of removing something, especially by force
The extraction of minerals has damaged the countryside. 采矿破坏了乡间的环境。
[ C ] medical specialized拔牙
the process of removing a tooth
She had two extractions. 她拔了两颗牙。
be of French, German, Chinese, etc. extraction 祖籍法国／德国／中国（等等）
to be from a family that originally came from another country
Paul, a carpenter of Dutch extraction, became our leader.
Around 45% of the Latinos in this city are of Mexican extraction.
She was an elderly lady of Scottish extraction who wore tweed skirts and sensible shoes.
Both crew members on this space shuttle mission are of Asian extraction.
As a dark-skinned woman of Dominican extraction, she felt she was treated differently from her colleagues.