generalizing from small samples of data is the bread and butter of science . 抽出したデータの標本から 一般化することは科学の基本です
during the economic restoration which followed world war ii , it was regularly seen all over japan as a way the poor earned their bread and butter , but they have become a rare sight in recent years . 第2次世界大戦後の復興時には、生活困窮者の生活の糧として日本各地で日常的に見られたが、近年ではほとんど見られることは無い。
English
Noun
the financial means whereby one lives; "each child was expected to pay for their keep"; "he applied to the state for support"; "he could no longer earn his own livelihood" Synonyms: support, keep, livelihood, living, sustenance,