notched beam

例句：

1. 1. The beam was notched to fit the wall perfectly.
   这个梁被刻得刚好适合墙。
2. 2. The engineer carefully notched the beams for the new building.
   工程师仔细地为新建筑刻制梁。
3. 3.The beam is notched with a saw to make it stronger.
   用锯子在梁上刻出缺口，使其更坚固。