Our technologies have advanced over the last 20-plus years to include lasers that fire out of the bottom of the aeroplane and those laser beams image the land surface.

过去的20多年里，我们的技术不断进步，这包括从飞机底部发的，这些束可以拍摄到陆地表面的图像。

They're big laser beams, about 40 by 40 centimeters.

这些巨大的束，大约40×40厘米。

These two traits give laser beams all kinds of special abilities.

正是这两个特性，让束拥有了各种特殊的能力。

NASA, America's space agency, has started using them to beam energy to remotely controlled drones.

美国航天局（NASA）已开始利用束将能量传送到远程无人驾驶飞机上。

Why isn't that laser beam cutting through the paint?

束为什么切不断烤漆？

And the sun is your energy and the laser beam of light is your focus.

太阳是你的能量，束就是你的专注度。

Eventually, the laser exits the emitter and is passed on to the galvo head, where it's reflected by two mirrors moving as fast as 10,000 millimeters per second, which guide the laser beam to its target.

最终，离开发器，被传递到镭，那里，它被两面以每秒 10，000 毫米的速度移动的镜子反，这将束引导到目标。

A laser beam passing through a jet of helium forms a stream of electrons, and a thin metal foil blocks their way.

束通过氦流形成电子流，一层薄金属箔挡住了它们的去路。

A similar method -- but one considered less dangerous -- would involve shooting laser beams from a spacecraft to destroy the side of an asteroid in an effort to push it away from Earth.

一种类似的方法——但被认为不那么危险——将涉及从航天器发束来摧毁小行星的一侧，试图将其推离地球。

Scientists from around the world queue up for months just for a chance to blast a tiny sample of matter with a laser beam.

这是工厂的时间表。来自世界各地的科学家们排了几个月的队，只是为了有机会用束轰击一个微小的物质样本。

These reflectors are used today to reflect back laser beams emitted from Earth, such as this one behind me.

这些反器现被用来反从地球发的束，比如我身后的这个。

A green laser beam stretching almost four kilometers across the city sky will stay lit during the entire festival.

整个节日期间，一束横跨天空近四公里的绿色束将保持点亮状态。

They plopped this rod into a beaker of water and hit it with a laser beam from below.

他们让这个翼状杆落入盛有水的烧杯中，并用束从底部击中它。

Measuring its thickness is trickier. From orbit, this is done by a mixture of radar and laser beam.

测量冰的厚度则更加棘手。轨道上，这是由雷达和束共同完成的。

There, lasers shine at two mirrors, which are angled in certain directions by commands given through custom-built software.

束会照2面镜子上，2面镜子的角度是根据指令来调节的，指令是由定制的软件来发出的。

A robotic alternative known as the " Agrilaser" randomly deploys sweeping laser beams to keep birds away.

一款名为 Agrilaser 的驱鸟机器随机扫束来驱赶鸟儿。

Two people were taken into custody after a laser was pointing at several helicopters in New York.

纽约发生手持式束照事件，两人被捕。

The laser beam is born in these machines down in the basement, and it's directed through a maze of lenses and devices that shape and monitor it.

束地下室的这些机器中产生，并通过迷宫般的透镜和设备来塑造和监控它。

The beam itself will be produced by a device called a fibre laser, this generates the coherent light of a laser beam in the core of a long, thin optical fibre.

波束本身将由纤设备产生并一个细长的纤核心产生束的相干。

So as the plane flies over and shoots a bunch of lasers, the trees actually blow a little, so a couple of the laser beams will get down to the ground surface.

所以当飞机飞过并发一堆时，树木实际上会被稍稍吹动，所以会有几束束会到达地面。