Be careful you don't knock your head on this low beam.
小心，别把头撞在这矮梁上。
Be careful not to bump your head on the beam when you stand up.
当心站起来时头别撞了横梁。
The electron microscope uses a beam of electrons to produce images at high magnifications.
电子显微镜利用一束电子产生高倍放大的影像。
我们有一个电子束。
He pointed the torch beam at the floor.
他把手电筒光束指向地板。
Since I had promised to focus on the economy like a laser beam, I began with that.
由于我曾许诺要像关注激光束一样关注经济，我就那样开始了。
Father and son looked up to the ceiling, and there on a beam sat the Talking Cricket.
父子俩抬头望着天花板，一只会说话的蟋蟀正坐在一根横梁上。
This technique makes use of a small flexible mirror placed in the beam of a telescope.
这项技术利用了放置在望远镜光束上的一个小的可弯曲的镜子。
When Brigida went out, she found the old man busy with putting a new beam along the wall.
当布丽吉特出去时，她发现老人正忙着沿墙安装一根新梁。
As a method of spanning space, the arch can support greater weight than a horizontal beam.
作为一种跨越空间的方法，拱能够承受比水平梁更大的重量。
So we've got a spectrum of a beam of sunlight and it looks like the colors bleed into each other.
我们得到了一束太阳光的光谱，它看起来像是颜色在互相渗透。
The car mistakenly thought that the laser beam was in its way and slowed down or changed the direction.
汽车误以为激光束挡住了它的路，于是减速或改变了方向。
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。
As I was running toward his crib, I saw a beam coming down and I placed myself over him trying to protect him.
就在我跑向他的婴儿床时，我看到一根房梁就要倒下来，我扑到他身上想护住他。
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。
During tests over several days, the pointer or tracker tracked an IR source and directed a laser beam at that source.
在几天的测试中，指示器或跟踪器跟踪一个红外光源，并引导激光束击中目标。
A major invention was the adjustable strut that could precisely set the depth of the plow by altering the distance of the blade and the beam.
一个重大的发明是可调节的支柱，通过改变刀板与横梁的距离来精确地设置犁的深度。
Inside the control room, physicists and engineers cautiously shot the beam down part of the tunnel, stopping it before it went all the way around.
在控制室内，物理学家和工程师们小心翼翼地在隧道的一部分将光束击落，在其完成全程之前把它拦截下来。
TEMs work by firing a beam of electrons through the material and measuring how it absorbs and deflects the particles to build up an image of the sample.
TEMs 的工作原理是通过发射一束电子穿过某种物质，并测量它如何吸收和偏转粒子来建立样本的图像。
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。
You all know how when you take a crystal prism and pass a beam of sunlight through it, you get a spectrum, which looks like a continuous band of rainbow colors.
你们都知道，拿起一个水晶棱镜，让一束阳光通过它，就会得到一个光谱，看起来就像一条连续的彩虹色带。
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