砂上

(1)a speculative scheme that depends on unstable factors that the planner cannot control; "his proposal was nothing but a house of cards"; "a real estate bubble"

(2)計画者がコントロールできない不安定なファクターに依存する思索的な計画

(3)an unstable construction with playing cards; "he built three levels of his cardcastle before it collapsed"

(4)トランプの札で作る不安定な構造

(1)