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Perhaps as important is the relation between the existence of solutions to a competitive equilibrium and the problems of normative or welfare economics.

"La muerte no existe, la gente sólo muere cuando la olvidan; si puedes recordarme, siempre estaré contigo."

每個人都是藝術家。

Food security is the cornerstone of national security.

合作是解決復雜問題的關鍵。

心理學必須建立在生活經驗的事實基礎上。

我相信第二次機會。