bottom clack

例句：

1. 1. The engineer inspected the bottom of the ship to find any damage.
   工程师检查了船的底部以查找任何损坏。
2. 2. The scientist conducted experiments on the bottom of the ocean to study its properties.
   科学家在海底进行了实验，以研究其性质。
3. 3. The construction crew worked on the bottom of the building to fix the leaky pipes.
   建筑工人在建筑物的底部工作，以修复漏水的管道。