essential idea的用法和樣例：
例句
- The basic idea behind the segmentation model is that memory is managed using a set of segments.
這種分段模型背後的基本思想是將內存分段管理。 - Then, the pivotal problem of lunar surface exploration is introduced and the essential idea of lunar rover share control is also discussed.
然後介紹了月球表面探測的關鍵性問題，詳細闡述了月球車共享控制的基本思想。
