Definition
To be far from satisfactory; to have significant room for improvement.
令人失望
The service at this restaurant really leaves a lot to be desired.
這家餐廳的服務真的有很大的改進空間。
The progress of this project still leaves a lot to be desired, we need to speed things up.
這個專案的進度仍然有很大的改進空間，我們需要加快速度。
The content and data analysis of this report leave a lot to be desired.
這份報告的內容和數據分析有很大的改進空間。