"Instead of nesting definitions" in docs

On this page: https://react.dev/learn/your-first-component

When a child component needs some data from a parent, pass it by props instead of nesting definitions.

all of a sudden, it says, "instead of nesting definitions". Can you explain in the docs more what is "nesting definitions" and how does it work to "attempt to pass some data and doesn't work or shouldn't be done"? I have never heard of "nesting definitions" after working with React for a few years.

從 https://react.dev/learn/your-first-component 上的 “Your First Component” 頁面開始，找到包含 “instead of nesting definitions.” 的句子。查看連結的 “Passing Props to a Component” 頁面以了解上下文，然後釐清巢狀定義的意思，以及為什麼偏好使用 props。當 React 使用者能夠理解這個片語和預期的資料傳遞指引時，即表示完成。