light piece的用法和樣例：
例句
- Sly Boy is an American red fox, with a thick coat of light brown fur.
鬼小子是一隻美國紅狐，身上有層厚厚的淺棕色的皮毛。 - If you are lucky enough to get a sleeper, you spend half the night staring at the small blue light in the ceiling, or fumbling to find you ticket for inspection.
就算你小子走運，能搞到一張卧鋪，你也得盯著車頂的小藍燈看上半宿，遇到檢查，你還得到處摸索車票。
