In biosafety laboratories and clean rooms, the over head lighting should be consisted of closed units fixed direct to or recessed in ceiling.

在生物安全实验室和洁净室，顶灯应该有密封装置直接固定在天花板上或嵌入在天花板内。

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He stopped and turned his head quickly, his poppy-cheeked face lighting up.

他停了下来，迅速地转过头去，有着深红脸颊的脸上露出喜色。

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While "taking up photography" might sound like a great idea now, but when you find out you need to wake before the sun and head out at dusk just to get the best lighting, you might not be as excited.

就拿“学习摄影”来说，这是个不错的主意，但是当你发现需要在日出前起床并得在昏暗的条件下工作只是为取得最好的采光，也许自己就不会那么兴奋了。

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This scenario is commonly referred to as 'head-lighting' because it looks like the dark space on the road between the headlights of a car.

ENGADGET: 3M Uniformity Tape improves lighting quality on LED edge-lit LCDs, lowers production costs

Pavements on Dogs Head Street, Falcon Road, Silent Street and Lower Brook Street are being realigned, and lighting and street furniture added.

BBC: Ipswich bus station 'remodelling' begins