flat bow

例句：

1. 1. The car's flat bow is designed to be easilyfolded and stored.
   这辆车的平直弓形设计是为了易于折叠和存放。
2. 2. Theartist used a flat bow to create theillusion of depth in the painting.
   艺术家使用平直弓形在画作中创造出深度的错觉。
3. 3. The flat bow was used asa tool for measuring distances on thefield.
   平直弓形被用作田野上测量距离的工具。