It starts with a machine able to emit a beam of laser light.
这一切从一台可以发射镭射光的机器开始。这种光束与仪器和工业生产用的激光不同。
A beam of laser light "pumps" the atoms so that their spins are polarized, then "probes" the polarized atoms for an MRI signal.
一束激光将原子泵出，使得它们的自旋带有极性，然后探测拥有极性的原子来产生MRI信号。
The laser, with its beam of strong light, can drill a hole in a diamond, and yet can be so well controlled that it can be used in delicate eye operations.
凭着本身强烈的光束，激光可在钻石上钻一个洞，而且可以被很好地控制，因此能用于精密的眼部手术。
This gives you a little bit of an idea of just how many individual photons there are in a laser beam of light.
这让你对一束激光中有多少个光子有了一点概念。
This gives you a little bit of an idea of just how many individual photons there are in a laser beam of light.
这让你对一束激光中有多少个光子有了一点概念。
The laser, with its beam of strong light, can drill a hole in a diamond, and yet can be so well controlled that it can be used in delicate eye operations.
激光有强烈的光束，可以在钻石上钻洞，而且可以被很好地控制，用于精密的眼部手术。
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。
However, many of us find great joy in our loved ones, and we can focus like a laser beam on our special interests for hours on end.
但是，我们中的很多人都非常享受和自己所爱的人在一起。如果对某件事有特别的兴趣，我们的精力会集中得像一束激光，干几个小时都不厌倦。
By splitting a laser beam and aiming each part onto opposite sides of a polished silicon wafer, the group engineered a system of reflection and interference that traps both beams in the silicon.
这组人员设计了一个反射和干涉系统，将激光分成两束，分别对准抛光硅晶片的两面，将两束光限制在硅当中。
Originally, Keeling measured the speed of light in the air samples with a laser beam.
起初，吉林用激光束测量光在这些空气样本中的传播速度。
LaserMotive USES special cells made with arsenic and gallium, elements better able to capture the near-infra-red wavelengths of its laser beam.
而激光动机公司制造的光伏板是用砷和镓制作的，这种光伏板能更好地从激光光束中近红外分层波长中的能量。
My initial ideas focused on laser beam-type duels between friends in front of the camera.
我最初的想法是让朋友们在摄像机前面进行星球大战那样的激光剑格斗。
The players' mutant genes 'linked up' with those already on the biochip and this allowed the scientists to read the footballers' genetic profile under a laser beam and assess the risk of injury.
球员的突变基因会与生物芯片本身的突变基因连接起来，使得科学家们能在激光束下读出球员的基因绘图，并估计出其受伤的危险系数。
If you recall, the same company had previously wanted to beam a laser AD up onto the moon for Pizza Hut, but had later scaled back to buying AD placement on the side of a Russian rocket.
如果你还记得，同一家公司曾希望用激光把必胜客的广告刻在月球上，但后来缩减成本买了俄罗斯火箭侧面的广告位置。
A laser beam like the one pictured up top combines short and long pulses of light to identify individual molecules with a high degree of precision from a safe distance.
一道激光射线由或短或长的光脉冲组合而成，从而能在一个安全的距离高精度地辨别单个的分子。
It transmits a laser beam through an optical cable to a robot, which angles lenses and mirrors in the end of its arm to aim the laser towards the parts that need welding.
它通过光导电缆发射激光给机器人，机器人用它手臂末端的角度透镜和镜子对准激光点焊接。
He adds that the distance problem is relatively easy to deal with by increasing the power of the laser, and it is less challenging technically than his proposals to beam power from orbit.
他强调距离问题可以用增强激光的能量来解决，它比为轨道提供能量更容易解决。
With each pulse of the laser beam, a tiny amount of corneal tissue is removed.
每一次激光束的脉冲移除微量的组织。
If the two arms have identical lengths, then interference between the light beams returning to the beam splitter will direct all of the light back toward the laser.
如果两条边一样长，分光器发射的激光将被完全反射回分光器。
Fiftyyears ago this Sunday, Theodore Maiman and his fellow scientists atHughes Research Laboratory shined a high-power flash lamp on a rubyrod, triggering a beam of coherent light: the first laser.
50年前的这个星期天，休斯研究实验室的西奥多.梅曼和科学家用高功率闪光灯照射红宝石棒，引发光束相干：第一台激光器 。
By reflecting a laser beam from a specially designed hologram (shown here as the colored circle), physicists created knots of dark filaments (represented by the colored knot).
通过从来自一个特殊设计的全息图(这里用彩色圆圈来表示)的激光光束的反射，物理学家创造了(用彩色结来表示)暗丝结。
Powder can be spread onto a tray and then solidified in the required pattern with a squirt of a liquid binder or by sintering it with a laser or an electron beam.
将粉末洒向一个托盘，然后用一小盘液体粘合剂把粉状物按需要的形状进行固化，或者用激光器或电子束管将其烧结成所需形状。
The sharp laser beam further zeros in on a small portion of the brain.
一旦感染，强烈的激光就会通过通道进一步瞄准脑的那一小部分。
Following 133 hours of firing a beam of intense laser light which created nitric acid particles in the air it resulted in binding the water molecules together to create droplets.
在连续133小小时向空中发射密集激光束从而在空中制造出硝酸粒子后，空气中的水分子凝聚在一起形成了小水滴。
Over those distances, even a sharp laser beam would spread to thousands of kilometres wide by the time it reached Earth.
在这种距离下，即便是聚焦良好的光束到达地球时也会分散到上千公里宽的面积上。
A team of physicists in the us has created an infrared laser beam at a point in mid air, by focusing a UV laser onto a tiny volume of oxygen molecules.
美国的一个物理学家团队通过将一束紫外激光聚焦于一小块氧分子中，发明了一种聚焦于半空中一点的红外激光束。
No, because nothing is actually crossing the surface of the moon - the dot isn't an actual object, it is just a series of photons in the laser beam hitting the surface.
其实不是这样，这是因为此时并没有什么实际的东西真正地横跨了月球的表面-亮点不是一个实体，它仅仅是击中月球表面激光束里一系列的光子。
This would allow it to adjust the intensity of the laser beam to account for the target's distance and atmospheric conditions, Mr Hore said.
一旦这种武器顺利上市，它会与英国现有的瞄准系统相结合，从而可以根据目标的距离和气象条件来调节激光束的强度。
This would allow it to adjust the intensity of the laser beam to account for the target's distance and atmospheric conditions, Mr Hore said.
一旦这种武器顺利上市，它会与英国现有的瞄准系统相结合，从而可以根据目标的距离和气象条件来调节激光束的强度。
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