trilith

例句：

1. 1. The scientist used a trilith to analyze the spectrum of light.
   科学家使用一个三棱镜来分析光的光谱。
2. 2.The optician's prism is essential for correcting vision in photography.
   光学镜片对于摄影中矫正视力至关重要。
3. 3. The trilith was an important tool in the early days of astronomy.
   三棱镜是天文学早期的重要工具。