Definition
This idiom is used to caution against being overly optimistic or making plans based on uncertain future events. It advises against counting on success before it is assured.
不要过早乐观
They haven't signed the contract yet, so don't count your chickens before they're hatched.
他们还没签合约，所以别高兴得太早。
She's signed up for the competition, but hasn't started training, so don't count your chickens before they're hatched.
她已经报名参加比赛，但还没开始训练，所以别高兴得太早。
Before we get the research results, let's not count our chickens before they're hatched by assuming our hypothesis is correct.
在我们得到研究结果之前，别过早假设我们的假设是正确的。