Have you heard the old saying, "Don't count your chickens before they're hatched"?

saying 是动词 say 的动名词形式，在这里用作名词，表示"谚语、格言"。 "Don't count your chickens before they're hatched" 是一句英语谚语，字面意思是"在小鸡孵出来之前不要数它们"，比喻"不要过早乐观"或"不要过早下定论"。