最佳 zuìjiā optimum
optimum; optimal; peak; best (athlete, movie etc)
How to remember 最佳: 最 the most + 佳 good = optimum.
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How it is used
- Means "best / optimal" - 最佳选择 (zuìjiā xuǎnzé) the best choice, 最佳时机 (zuìjiā shíjī) the optimal moment.
- A formal, written near-synonym of 最好 (zuìhǎo); common in awards (最佳影片, best picture) and technical contexts. Attributive, not usually predicative.