being gained or lost by chance (/accidentally) ❍ 对那些～的东西，你可别太放在心上。Don’t take too much to heart those things that may be gained or get lost purely by chance.
佹得佹失ɡuǐ dé ɡuǐ shī
佹：偶然。指很偶然的得失。sudden gain and loss respectively, being gained or lost by chance