stiff as buckram

例句：

1. 1.The old sofa is so stiff that it's almost impossible to move around on it.
   那张旧沙发太硬了，几乎无法在上面移动。
2. 2. The material is stiff as buckram, making it difficult to cut through.
   这种材料像硬纸板一样坚硬，很难切割。
3. 3. The dress fits her like a tight buckram shirt, making her look stiff and unflattering.
   这件衣服紧得就像一件紧绷的硬纸板衬衫，让她看起来僵硬而不自然。