查询词典 Lens

Unlike the 28-70, it has a fixed rear lens element so the tendency for the lens to act as a "suction device" is eliminated. In fact, the element is fixed both for focusing and zooming, very neat and clever.

24-70 与 28-70 不同的地方，在於(24-70)有固定的后镜组，变焦跟对焦时都不会变动，不会有如同吸尘器一般的效果，是非常好的设计。

Maintains 1, cleans the lens, with the telescope supplements the lens flannelette, or other soft, clean cloth.

保养 1、擦拭透镜时，用望远镜附带的镜头绒布，或其它柔软、清洁的布。

The origin of this color can be traced down to the negative lens of the objective and the first ocular lens. Both of them are made of SF3R, a special radiation resistant flint glass (here I have to correct my statement made in another review : The origin of the yellow color is, at least in the EDF, a radiation resistant glass).

这黄色的来源能追踪到物镜的负透镜和第一块目镜，这两个都是SF3R做的，一种特殊的能抗辐射的含铅玻璃（这里我纠正另一个评测中的观点：黄色的来源，至少在EDF中，是抗辐射玻璃）。

The lens telescope, or refractor, was vastly improved when it became possible to manufacture high-quality lens es made from flint glass

透镜望远镜，或称折射望远镜，在人们能够制造出高质量的火石玻璃透镜以后得到了很大的改进。

Below 200 times smooth lens, area of illuminate of domestic hare liver all appears out-of-the-way sex injures vein blood-vessel in the center of different level flocculus hepatic illuminate area has times light of;400 below lens the Kupffer cell that gobbles up a function relatively not illuminate area has decrease apparently.

菲力磁增强自旋回波序列T1WI、T2WI扫描分别检出11只、9只阳性家兔，肝脏照射区呈高或相对高信号改变。200倍光镜下，家兔肝脏照射区均出现不同程度小叶中心静脉血管闭塞性损伤；400倍光镜下肝脏照射区具有吞噬功能的Kupffer细胞较未照射区有明显减少。

AW: In general terms in the design of a lens the size of the lens can be minimized when the focal length and back focus distance are roughly equal.

伍尔兹：从总体上看在设计镜头大小的镜头时，可以减少焦距和背部重点距离大致相等。

These are called vertex focal distance because they are measured from the vertex of the lens surface to the lens focal point, The focal powers corresponding to them are the back and front vertex powers.

13从透镜的表面到焦点的距离被称为顶点焦距，是以透镜的前后顶点为起点测量的。与之相对应的屈光度称为前后顶点焦度。

Ohio State University, according to visual determination of the clinical professor Gregory Goode introduction, if your prescription is very simple, is not required at the same time to correct hyperopia and myopia dual optical lens, or does not require correction with a close-up, respectively, visual, medium-range vision and distance vision three focal length lens, you can with a pair of cheap glasses.

俄亥俄州立大学，根据临床教授格雷戈里古德介绍视觉的决心，如果你的处方很简单，不需要在同一时间，以纠正近视和远视的双重光学镜头，或者不需要的特写镜头校正，分别，视觉，中程的远见和远视力3焦距镜头，你可以用廉价眼镜。

The ratio of the focal length of a lens or lens system to the effective diameter of its aperture.

光学仪器的目镜上的细线、圆点、十字型细线或金属丝组成的系统。

It's M2 factor is approaching the ideal value 1 and the beam intensity profile remains Gauss Profile. Laser beam with good propagation and focus characters. The beam can propagate a long way and can be focused with lens with long focal distance. The focal beam waist radius is 134μm, the focal distanced of the focus lens is 300mm. It's focal depth is about 5mm and the focal shift is about 1mm in the range of processing (3m).

结果表明，Slab CO2激光器具有高光束质量，其M2因子非常接近1的理想值；激光束具有良好的传输和聚焦性能，可以长距离传输；使用焦距为300mm的聚焦镜聚焦，聚焦光斑的束腰半径约为134μm，光束横截面能量分布接近理想的高斯分布，焦深约为5mm，在加工范围内(3m)，激光束的焦点漂移量大约为1mm。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

Talk Undelete failed; someone else may have undeleted the page first.

Talk 无法删除选定的页面或图像（它可能已经被其他人删除了）。