blind optimism; unfounded optimism; being prematurely optimistic
尽管目前项目进展顺利，我们也不能盲目乐观，要时刻做好应对挑战的准备。
Although the project is progressing smoothly at the moment, we cannot be blindly optimistic; we must always be prepared to face challenges.
Era:
Modern
Frequency:
Next Idiom