1. 鞍状峰：saddle-backed 凹背的 | saddleback 鞍状峰 | saddlebag 鞍囊

2. 脊柱前凸：saddle nose 鞍鼻 | saddleback 脊柱前凸 | sadism 施虐狂

3.

3. 鞍板：saddle 支架 | saddleback 鞍板 | saddlecut-out 鞍座断流器

4. 鞍背：saddleaxis 背斜轴 | saddleback 鞍背 | saddlebearing 游梁轴承

1. a double sloping roof with a ridge and gables at each end

    Synonym: gable roofsaddle roofsaddleback roof

2. a pass or ridge that slopes gently between two peaks (is shaped like a saddle)

    Synonym: saddle