这条山路蜿蜒曲折，开车要格外小心。

The ___sinuous mountain road requires extra caution when driving.

河流在山谷中蜿蜒流淌，形成了优美的曲线。

The river flows in a ___sinuous path through the valley, creating graceful curves.

他通过曲折的方式获得了那个职位，没有直接申请。

He obtained the position through a ___sinuous approach, never applying directly.