soffit of vault

例句：

1. 1.The soffit of the roof is designed to protect the rafters from rain and snow.
   屋顶的檐口设计用来保护椽子免受雨水和雪的侵蚀。
2. 2.The soffit was made of wood and had a decorative design on it.
   檐口由木头制成，上面装饰有图案。
3. 3. The soffit of the porch is covered in a rich, dark stain that matches the rest of the house.
   门廊的檐口覆盖着一种深而丰富的染色，与房子的其他部分相协调。