a bridge too far (a buridji tsū fā)

Idiom International

意味

an attempt or goal that is too ambitious or impossible to achieve

達成不可能なほど野心的な試みや目標 (tashō fukanō na hodo yashinteki na kokoromi ya mokuhyō)

例文

"The proposal to negotiate with all the countries at once was a bridge too far."

"すべての国と一度に交渉する提案は手の届かない橋でした。" (subete no kuni to ichido ni kōshō suru teian wa **te no todokanai hashi** deshita.)