dull glass

例句：

1. 1. The dull glass reflected the dim light from the street lamp.
   这面迟钝的玻璃反射着街灯微弱的光芒。
2. 2. She found the uninteresting book to be quite dull.
   她觉得这本无趣的书非常枯燥。
3. 3. His insipid painting lacked any real vibrancy.
   他的画作毫无生气，显得平淡无奇。