半永久的

(1)relating to or extending over a relatively long time; "the long-run significance of the elections"; "the long-term reconstruction of countries damaged by the war"; "a long-term investment"

(2)比較的長い時間に関連すること、または比較的長い時間に及ぶさま

(1)the long-run significance of the elections

(2)選挙における長期的な重要性

(3)the long-term reconstruction of countries damaged by the war

(4)戦争で破壊された国の長期的再建

(5)a long-term investment

(6)長期的な投資