roof expansion joint

例句：

1. 1.The roof expansion joint was causing the house to sag.
   屋顶伸缩接头导致房屋下沉。
2. 2. The builders had to replace the roof expansion joint after heavy rain.
   暴雨过后，建筑工人不得不更换屋顶伸缩接头。
3. 3. The old building needed a new roof expansion joint to prevent leaks.
   旧建筑需要一个新的屋顶伸缩接头来防止漏水。