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"
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
bubble
an impracticable and illusory idea; "he didn't want to burst the newcomer's bubble"
実行不可能で、空虚な考え
bubble
a dome-shaped covering made of transparent glass or plastic