Light boxes for that purpose are available without a doctor's prescription.

灯箱无需医生处方即可用作这种用途。

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As the match began, I was alarmed to see that the other team was wrestling without headgear, a kind of light helmet designed to protect a wrestler"s ears.

比赛开始时，我吃惊地发现对方选手在摔跤时没有戴头盔，那是一种轻型的头盔，用来保护摔跤选手的耳朵。

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This means that artists were forced to work in cramped spaces and without sources of natural light.

这意味着艺术家被迫在狭小的空间里工作，并且没有自然光。

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All of these things and more are described in a straightforward style that keeps pages turning without making things artificially light.

ECONOMIST: Science and history of colour

If the belligerents are hurtling missiles at each other that travel faster than light, it might be difficult to prosecute a war for resources without destroying the planets that have the resources they covet.

FORBES: Interstellar Aircraft Carriers and Science Fiction Naval Warfare

Obviously at 400 feet it's really quite dark but at the surface it starts off being very very light, even without a mask I can tell that.

BBC: Breakfast with Frost