bed dowel

例句：

1. 1. The bed dowel is the only thing that holds the mattress in place.
   床支柱是支撑床垫的唯一东西。
2. 2. The bed dowel was made of wood and had a smooth surface.
   床支柱是用木头做的，表面很光滑。
3. 3. The bed dowel was too short, so we had to buy a new one.
   床支柱太短了，所以我们不得不买一个新的。