What is the French phrase 'histoire d'ours' in English?

"Bear story" is an English equivalent of the French phrase "histoire d'ours."

Specifically, the feminine noun "histoire" means "history, story." The preposition "d"* means "of, from." The masculine noun "ours" means "bear."

The pronunciation is "ee-stwahr doorss."

The preposition actually is "de." But the vowel "e" drops before a noun that begins with a vowel. The temporary nature of that drop is indicated by an apostrophe immediately after the remaining letter "d" and immediately before the succeeding noun.