internal illumination

例句：

1. 1. The new office building has a very high level of internal illumination.
   这座新办公楼的内部照明非常先进。
2. 2.The engineers worked tirelessly to improve the internal illumination in the factory.
   工程师们不懈努力，改善了工厂的内部照明。
3. 3.The museum's exhibits are illuminated with internal illumination to enhance the visitor experience.
   博物馆的展品通过内部照明来增强参观者的体验。