長ちょう期きにわたる

expression, godan verb (-ru)

be protracted; extend over a long period; be prolonged

Describes a situation, process, or state that continues for a long time. Often used in formal or written contexts.

• 交こう渉しょうは長ちょう期きにわたることが予よ想そうされる。

  The negotiations are expected to be protracted.

• このプロジェクトは長ちょう期きにわたる計けい画かくです。

  This project is a long-term plan.