单词wheels within wheels
na.: 复杂的机构；复杂的事情；神秘复杂的原因[过程]
网络: 错综复杂之理由；复杂的结构；一环套一环
Getting a proposal through the council"s various committees and subcommittees is almost impossible because there are wheels within wheels.
要使一项提议在市政会的各种委员会和小组委员会获得通过几乎是不可能的，因为情况错综复杂。
There are wheels within wheels.
轮中有轮，幕后有人。