T beam

例句：

1. 1. The beam is too long for the space available.
   这个梁太长了，空间不够用。
2. 2. The beam was used to support the roof.
   这个梁用来支撑屋顶。
3. 3. The beam was reinforced with steel bars.
   这个梁被钢筋加固了。