wheels within wheels

• n. 复杂的结构；错综复杂的情况

wheels within wheels的用法和样例：

例句

用作名词 (n.)

1. The view state is contained in a structure within the page code.
   视图状态包含在页代码内的结构中。
2. Like Darwinian evolution, cosmic expansion provides the context within which simple structures form and develop over time into complex structures.
   宇宙的膨胀就像达尔文的演化论，对于简单的结构如何逐步发展形成复杂的结构，提供了可循的脉络。