a one-piece swimsuit的用法和样例：
- The valve shall consist of a one piece modular check and float assembly made of engineered thermoplastic and housed in a bronze body.
- The bed is a one piece casting with both the saddle and tailstock guideways in the same plane to eliminate thermal distortion.
- There's only one piece of cake left.
- A shaped mass of bread baked in one piece.
- They were lucky to get back in one piece.