unadventurous

adj.

1. 不愿冒险（或尝试新奇事物）的
   not willing to take risks or try new and exciting things

1. Generally, though, The Casual Vacancy is a solid, traditional and determinedly unadventurous English novel.
   但基本上，《临时空缺》是实在的、传统的、决不冒险的英文小说。

adj

1. lacking in boldness