主系统包括：驾驶舱灯光、客舱灯光、外部灯光及应急灯光。本文中，我们将只讲驾驶舱灯光。
The major systems are: flight compartment lights, passenger compartment lights, exterior lights and emergency lights. In this lesson, we will introduce the flight deck lighting only.
主人曾经居住过的主屋照明条件很差，湿度很高，它整天都需要灯光和加热器，直到入夏。
The main house which the owner had lived had a bad condition for lighting and the humidity was high, it needed a light all day and a heater until beginning of summer.
主材为钢材和混凝土，家具选用与之形成鲜明对比：温暖的灯光衬托出舒适的布艺沙发与座椅。
The furniture is selected to contrast with the steel and concrete, with comfortable fabric chairs and sofas along with warm lighting.
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