solid door frame

例句：

1. 1. The building is made of solid bricks.
   这座建筑是用实心砖砌成的。
2. 2. The car was solidly built and had a smooth ride.
   这辆车结实地建造，驾驶起来平稳舒适。
3. 3. The solid rock was untouched by the flood.
   坚固的岩石没有被洪水冲毁。