Moreover, engineers have worked out how to make laser beams more intense by using short lengths of optical fibre to narrow the beam.

此外，工程师们还通过光纤的短长缩小了传送的光束，由此找到了让激光传送器能源更加密集的方法。

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Take laser transmission, for example. "High powers concentrated in a narrow laser beam could cause serious damage to a person, " says Karalis.

拿激光传输来说，卡拉里斯就称：“大量能量聚集成一束狭窄的激光束，可能会给人造成严重伤害。”

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For this effect, we're going to use a very soft, narrow beam, so go under the Style pop-up menu at the top of the dialog (this is where the presets are) and choose Flashlight.

为了这个效果我们需要用到一个很窄的柔化光束。所以在对话框顶部的样式选择菜单中点选手电筒效果。

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One idea is that the energy from some bursts may be concentrated into a narrow beam though no one yet knows how.

ECONOMIST: An illuminating burst

The trailer-mounted radar is a "phased array" type - it scans the sky with a narrow beam which flicks between thousands of locations each second.

BBC: Fact file: Patriot missile defence

Walking straight on a narrow beam is frustrating and wrong.

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