But lens replacement is not yet perfected, largely because replacement lenses themselves still have room for improvement.
但是晶体的替换仍不完美，主要是因为替换晶体本身仍有改进空间。
Some of these phenomena can also be tracked through the historian's lens, but some are, I believe, genuinely new.
这些现象其中一些也可以通过历史学家的视角来追溯，但我认为，其中一些是真正的新现象。
The contact lens has not been put to the market, but researchers are quite sure that it will be welcomed.
这种隐形眼镜还没有投放市场，但研究人员确信它会受到欢迎。
But such applications are still a ways off, she said, as the acoustic lens has not yet been tested on cells or living animals.
但是，这种应用还需要一段时间，她说，因为声透镜尚未对细胞或活着的动物做过测试。
Experts say a 135mm lens would produce the best, most consistently accurate results. But even then there's an element of risk.
专家们称135毫米的镜头能照出效果最佳最稳定精准的照片，但即便如此也会有失真的风险。
But there is a problem with using amperometric sensing: the electrodes are not sealed within the lens, and therefore are exposed.
然而，使用这项技术有一个问题：电极并没有密封于镜片内，而是暴露在外。
To prove his point, he took a series of portraits, using the same model's facial expression and the same lighting - but each time changing the lens.
为了证明他的观点，他利用相同的照明条件，为一位模特的同一面部表情拍摄了一组肖像照，但是每照一张就更换一种镜头。
Nearsightedness associated with cataracts in the center of the lens is often classified with the pseudomyopias, but it is actually a permanent change in the way light focuses in the eye.
与发生于晶状体中心白内障相关联的近视被归于假性近视一类，但它确实且永久地改变了光线在眼内聚焦的方式。
But the operation was not going smoothly. Schwarz's endoscope kept bumping into ice crystals that blurred the camera lens.
但是整个的操作进行得并不顺畅，施瓦茨的内诊镜总是碰撞进冰晶里面弄糊摄影机镜片。
Light painting, also known as light drawing or light graffiti, can produce some truly stunning results but don't be fooled, it isn't as simple as just waving a little light in front of a lens.
光线喷涂，也称之为光线绘画或光线涂鸦，确实能够产生一些令人称奇的结果，但是不要被其表面蒙住了，它可不是仅仅在镜头前挥动一些光线那么简单。
But not just for its own sake or because they mistakenly believe that science holds "the key" to human progress or provides the lens through which such progress should be viewed.
但是不仅仅是为了科学本身，或者因为他们错误地认为科学拥有人类进步的“关键”或提供了可以看见这类进步的镜头。
But unlike the usual point and shoot pocket cams, the Sanyo boasts some serious specs, including a 3x optical zoom lens.
但是不像其他的袖珍(口袋型)摄像机，这款三洋相机拥有3倍的光学变焦镜头。
Over the years, several new batches of the lens were manufactured but only in small quantities.
多年来，该款镜头又生产过几个批次，但数量都很少。
Digital SLRs with a lens focal length of 300 to 400mm are recommended, but you can get away with a decent compact with a 10x zoom.
推荐使用带有300 - 400毫米镜头的数码单反相机，但如果有一架有10倍变焦镜头，性能良好的小型相机也可以。
The Hyatt Regency Washington D. C. is certainly located near the U. S. Capitol building, but not as near as the hotel website's photo, taken with a zoom lens, indicates.
华盛顿凯悦的确位于美国国会大厦附近，但不像该酒店网站上用变焦镜头拍摄的照片所显示的那样近。
But what if you could do away with that lens and create a microscope that fits on a cell phone?
可你能不能抛掉透镜，发明适用于手机的显微镜呢？
We haven't been able to find out who the customer was—or whether anyone else has ordered this lens—but the lens features Arabic lettering and an emblem of the State of Qatar, one of the Arab emirates.
我们没能找到这个客户到底是谁，也没能找到谁曾经订购过这枚镜头，但是该镜头上刻有阿拉伯文字和卡塔尔的标志。
Color captured in images using the Canon looked a little brighter than those captured with the Panasonic, but the Panasonic's 16x zoom offered further reach than its rival's 14x lens.
佳能照相机拍出来的照片色彩比松下的要亮一点，但松下的16倍变焦比佳能的14倍变焦让我能定焦更远。
I got as close as three metres away with my wide Angle lens, but she always gave me the look to say please keep away when she needed to.
我用我的广角镜头靠近它们在3米左右，但它也总是会看着我表示它需要我离它远点。
Age-related cataracts can start as early as the 40s, but it is most often after age 60 that such clouding of the lens begins to affect vision.
与年龄相关的白内障有可能在四十几岁开始，不过六十岁以后，这种影响视力的晶状体混浊现象最常见。
you can use it for that, but don’t let your zoom lens make your lazy. You still need to use your feet!
当然，你可以那样，但是不要因为变焦而让你变懒，该挪动的时候还是要用脚。
There are many advanced sensors that would amplify the lens’ abilities, but the difficulty lies in integrating them, which is why Parvis and his colleagues have had to engineer their own components.
有许多先进的传感器，可以增强隐形眼镜的能力，但是难就难在如何将它们集成到一起，这也是Parvis和他的同事们不得不亲自动手制作元器件的原因。
There are many advanced sensors that would amplify the lens' abilities, but the difficulty lies in integrating them, which is why Parviz and his colleagues have had to engineer their own components.
有许多先进的传感器，可以增强隐形眼镜的能力，但是难就难在如何将它们集成到一起，这也是Parvis和他的同事们不得不亲自动手制作元器件的原因。
But focusing on close objects involves contraction of muscles controlling the shape of the eye's lens. And one possibility is that "this constant contraction may stretch the eyeball.
目前没有研究显示为什么大量阅读会导致这一结果，但是由于长时间聚焦近处的物体需要眼部肌肉持续收缩以保证视网膜保持需要的形状，因此这种眼肌的持续收缩状态可能会使眼球受到拉伸，长期如此，其原有形状可能会被永久地改变，从而导致近视产生。
Wide-angle lenses tend to work best because the blown-out sun takes up less of the image, but they are susceptible to lens flare.
很多情况下使用广角镜头是合适的，它可以让曝光过度的太阳占据较少空间。但广角镜头很容易受到产生光晕。
In an objective sense, the movie is only so-so, but it's a lot more interesting when viewed through a subjective lens.
客观感觉而言电影本身只是马马虎虎，但是从主观感觉上电影里还是有很多有趣的事情。
It is possible that cleaning the lens regularly could reduce this problem, but it is unclear what effect lens-cleaning fluid would have on its built-in electronics.
定期清洗镜片或许能减少这样的问题产生。不过，镜片清洗液会对内嵌的电子设备造成什么影响还不好说。
It is possible that cleaning the lens regularly could reduce this problem, but it is unclear what effect lens-cleaning fluid would have on its built-in electronics.
定期清洗镜片或许能减少这样的问题产生。不过，镜片清洗液会对内嵌的电子设备造成什么影响还不好说。
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