Definition
This idiom indicates that there are no strict or inflexible rules that must be followed.
沒有明確的規則
There are no hard and fast rules about how to approach this problem, so we need to be more flexible.
對於如何處理這個問題，並沒有明確的規則，所以我們需要更加靈活。
In the field of design, there are no hard and fast rules; creativity is the most important thing.
在設計領域，並沒有明確的規則；創意是最重要的。
In interpersonal relationships, there are no hard and fast rules; you need to adjust your behavior based on the situation.
在人際關係中，並沒有明確的規則；你需要根據情況調整自己的行為。