distortionless line

例句：

1. 1. The new model is distortionless, with no visible defects.
   这款新模型是无变形的，没有可见缺陷。
2. 2. The painting was distortionless, as it had been carefully restored.
   这幅画是无变形的，因为它已经被仔细修复了。
3. 3. The scientist's theory was distortionless, providing a solid foundation for further research.
   科学家的理论是无变形的，为进一步研究提供了坚实的基础。