In this experiment, we use two gratings with the same frequency to generate Moire fringes and use them to measure the long focus length of lens.
本实验是利用两块空间频率相同的黑白光栅产生的莫尔条纹来测量长焦距透镜的焦距。
When zoom lens are used for military sighting, the drift of optical center caused by the change of focus length will reduce the sighting accuracy severely.
长焦变焦镜头用于军事瞄准时，变焦过程中较大的光中心漂移，降低瞄准精度。
The adverse projection measuring method reverse the position of object and image in the imaging system of lens, it overcome back focus length and resolution power limitation.
逆投影法颠倒镜头成像系统物和像的位置，克服了手机镜头后焦、像素等的限制。
A child that suffers from ADHD may have trouble following instructions includingthose for finishing school work, performing chores or anything else that requires focus for any length of time.
一个患有多动症的小孩可能会有困难跟着教学指令，比如说需要更长的时间来完成家庭作业，做些杂物或者其他的一些事情。
The clear focus, accessible language and length ensure that the book will be read, and hopefully also used.
有明确的重点，易懂的语言和可以接受的长度确保了这本书将被更多的人读到，并可望在应用于实践中。
We picked two weeks because it is the default iteration length at Digital Focus.
选择两周这个时长是因为它是DigitalFocus公司默认的一个迭代周期。
Conversion and validation allow you to focus on business logic rather than the tedious qualifications of input data such as null checks, length qualifiers, range boundaries, etc.
转换和验证使您可以侧重于业务逻辑，而不是侧重于对输入数据进行繁琐的资格认定，比如null检验、长度限定、范围边界，等等。
The long length of life, most people focus too much on the life of frustration and suffering.
在人生的漫漫里程中，多数人过多地关注了生活中的挫折与苦难。
But the one thing you can focus on during every length of the freestyle is the timing of your breath, and keeping on goggle in when you breathe.
但有一件事是你可以在游每一趟的时候都注意的，就是呼吸的时机，以及呼吸时保持一只泳镜在水里。
Focus: plane of focus; focal length; and depth of field.
焦距：焦点平面，焦距和景深。
A new type of focusing lens which can focus a laser beam into a line of any length and its possible applications are proposed.
提出了一种能把激光束聚焦成任意长度的新型直线聚焦透镜及其可能的应用。
The focus is given to the influence of pumping power, cavity length, the output coupler transmission and initial transmission on the repetition rate, pulse width and output power of laser output.
着重研究了抽运功率、腔长、输出镜透过率以及初始透过率等因素对激光输出脉冲序列的重复率、脉冲宽度以及输出功率的影响。
Then a brief introduction to the length approach in composition writing proposed by Professor Wang Chuming is made with focus on its fresh teaching ideas and teaching task design.
然后，作者简要叙述了王初明教授倡导的外语教学中的“写长法”的一些理念和教学设计原则。
The white papers available are supplemental to the core documentation set and can vary greatly in focus, scope, and length.
可用的白皮书是对核心文档集的补充，它们在重点、范围和篇幅上可能会有很大的差异。
If you're really serious about this, I've even heard of photographers setting out cups length-wise on a picnic table to estimate the distances you start to loose focus.
如果你对这个真的很在乎，我听说有摄影师通过在野餐桌上纵向排列杯子来估测景深范围的。
Length: Nicklaus has more of a concern about the need for tournament play; Doak has more focus on the members.
长度：尼克劳斯更关心于举行大赛的需要；多克更关心普通会员。
Focal length: The distance between the centre of a lens and its principal focus.
焦距：镜头中心与其主焦点的距离。
On the fifth length, breathe every 5. Keep your breathing relaxed and steady, and focus on a clean hand entry, full extension, and getting an early catch.
在第五个游进长度中进行五划一换气。继续保持呼吸放松稳定，手入水要做到干净利落，伸展要完全，抓水要及时。
Once you choose a lens whose focal length is closest to the focal length required by your imaging system, you need to adjust the working distance to get object under inspection in focus.
一旦你选择一个镜头其焦距是最接近于你成像系统所需之焦距，你需要调较工作距离去获取观察目标物的焦点。
Focal point is, the distance between the two is the focus of the focal length.
定点是焦点，两焦点的距离是焦距。
On the fifth length, breathe every 5. Keep your breathing relaxed and steady, and focus on a clean hand entry, full extension, and getting an early catch.
在第五个长度，每五划换气。保持呼吸放松稳定，手干净的入水，完全的伸展，及时抓水。
After analyzing why the focal length changes, I give an automatic focus algorithm controlled by computer.
对自动聚焦问题，分析了焦距变化的原因，给出了计算机控制的自动聚焦算法。
The cable is a very important member in the cable bridge, and its length is greatly increasing with the span of the bridge. The vibration control of a light and long cable is an attentive focus.
斜拉索是斜拉桥等索支撑结构中重要的受力构件，随着斜拉桥跨度的逐渐增加，拉索也越来越长，轻而长的拉索的振动控制问题也日益突出。
Tsering Norbu's short and middle-length novels focus on the lives of lower class people, scrutinizing the influences on them from the ideas of Sipay Korlo and Karmic Retribution in Tibetan Buddhism.
次仁罗布的中、短篇小说在关注下层民众的生活中审视了藏传佛教的生死轮回、因果报应的观念给他们带来的影响。
Focal length is the distance between optical centre and principal focus.
焦距就是镜片中心和焦点之间的距离。
Focal length is the distance between optical centre and principal focus.
焦距就是镜片中心和焦点之间的距离。
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