Adequate lighting shall be provided for nighttime transfer operation.
要为夜间的转移操作提供充分的照明。
Lighting a surface can be a costly operation.
光照一个表面可以是一个昂贵的操作。
Acording to the problems of lighting system in the classrooms, the paper analySes the lighting economic operation and gave some improving Suggestions.
从现有教室照明系统存在的问题出发，对教室照明的运行进行了经济分析，并提出了改进措施。
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