So, by measuring the ratio of the two isotopes in the rings of trees, and matching the result to the age of the ring, a history of hurricanes spanning the life of the tree can be reconstructed.
因此，通过测量树的不同年轮(ring)中两种氧同位素的比例，并将结果比对年轮所显示的树龄，就可再现树木一生中所经历的所有飓风。
The quality analysis for gas nitrocarburized inner gear ring of heavy truck imported from Austria was taken by means of macro/micro-examination, hardness measuring and running test.
利用宏观分析、显微检验、硬度测试和装车试验等手段，对引进奥地利重型汽车内齿圈按照新的气体氮碳共渗工艺处理后的质量进行了研究。
The limits are valid for bearings before mounting under zero measuring load, and with no axial displacement of one ring relative to the other.
在测量负荷为零、而且一个套圈相对于另一套圈无轴向位移的情况下，这些限值对安装前的轴承有效。
The optical waveguide ring resonator is the key sensing unit of the resonator integrated-optic gyro. Its finesse determines the measuring accuracy of the gyro.
光波导环形谐振腔是谐振型集成光学陀螺的核心敏感部件，其清晰度决定集成光学陀螺的测量精度。
To calculate the key measurement Dr Manning recommends photocopying the right hand and measuring the length of the index finger and ring finger, using accurate callipers.
为了测量关键数据，曼宁教授建议把右手影印下来，用精确的千分尺测量食指和无名指的长度。
The effect of the size of the central dark spot in Newtons ring pattern on measuring results has been analyzed, and a solution is given.
本文分析了牛顿环中心暗斑大小对测量结果的影响，并给出了解决方法。
The primary objective of this study is to demonstrate the feasibility of measuring intersection angle of the steel stiffening ring connection using the digital image correlation method (DICM).
连接的转角是其研究的重要指标，因此连接转角测试方法的实用性和有效性对连接工作性能研究的深入开展有非常重要的影响。
In this paper, the new measuring method of taper-face position ring is introduced.
介绍了一种新的锥面活塞环测量方法。
It is a better measuring method using the locking point of ring as a measurement basic point.
以套圈锁点为测量基准是较好的测量方法。
We intro-duce the methed of making the limbal ring-rod and the methed of measuring geometric drawing for reference.
本文还介绍了定位器的制作和几何测量等方法，供参考。
The measuring system consists of a laser diode, an optical ring pattern generator and a CCD camera.
测量系统主要由半导体激光器、环形光发生器以及CCD摄像机组成。
The process is costly and can be unreliable as the expansion of the inner ring is controlled indirectly by measuring axial displacement of the ring, rather than the expansion of the inner ring itself.
这个过程是昂贵的，可作为内圈膨胀是不可靠的间接控制，通过测量轴向位移的戒指，而不是内环本身的扩展。
It is focused on a new measuring method called partial-thin-wall method for the radial pressure distribution on a piston ring as well as on the theoretical evaluation of its working principle.
着重介绍了活塞环径向压力测量的一种新方法——局部薄壁测量法，并从理论上对这种测定方法进行了分析。
For the expansion of Newton ring experiment, two formula of measuring film thickness is proved according to the experimental principle, and the formula is also discussed.
本文对牛顿环实验进行拓展，根据实验原理推导出两个用于测定薄膜厚度的理论公式，并对公式进行了理论分析。
Mechanical method is a category of measuring residual stress. In the category, hole-drilling method, ring-core method and dissecting method are commonly used.
机械法是测残余应力的一类方法，其中常用的有盲孔法、环芯法和剖分法。
The influence of resistance strain gauge length in strain-ring on measuring sensitivity is analysed as well.
同时分析了应变环中电阻应变计长度对测试灵敏度的影响。
Expcrimental stress analysis by electrical measuring method was carried on the ring plate with fixed outer perimeter, free inter perimeter and received even load.
用电测法对外周边固定、内周自由、受均布载荷的环板进行实验应力分析。
Additionally, an elastic ring is mounted on the detection port of the detector in the color measuring spectrometer so as to prevent light leak.
另外，在测色仪中探测器的探测口上安装弹力圈，可防止漏光。
The mutual matching of rigidity from three directions between elastic ring and sensor is the core of problem of structural optimization design of piezoelectric milling force-measuring platform.
压电磨削测力平台结构优化设计的核心是弹性环与传感器三向刚度相互匹配的问题。
The best experimental parameters were Chosen through orthogonal experimental design and fuzzy analysis. The analytical results provided basis for application of ring-hole measuring fabric.
在环孔法测试织物的基础上，采用正交试验设计、模糊分析的方法优选试验参数，为环孔法测试织物提供了依据。
As a classical experiment, Newton ring experiment is usually used in measuring the radius of curvature of a lens.
牛顿环实验是大学物理实验中的一个基本实验，目前的实验只是用于测透镜曲率半径。
There are many advantages for the new method of noncontact measurement employing the sensor for measuring piston ring end gap clearance dimension.
用其检测活塞环闭口间隙尺寸，是一种新的非接触式测量方法，具有许多优点。
The Lil Chef Set is a three piece toy cook set including a pot, measuring spoons and a shaker on a ring.
里尔套装玩具是三件套的厨具玩具，包括锅、量勺和带环的搅拌器。
A new method for measuring the 3D motion of balls in angular contact ball bearings fitted with a magnetized ball is proposed, in which Hall Sensor is fixed to its outer ring and cage side face.
提出了通过在装有一个磁化钢球的轴承外圈及保持架侧面配置霍尔传感器，测量钢球三维运动的新方法，阐述了该测试方法的基本原理；
Whether the three - ring reducer is qualified is measured automatically by measuring system, which can trigger sound and light alarm system for unqualified product and record it.
测试处理后，系统自动判断三环减速器振动量是否在要求范围内。对于不合格的产品，单片机系统自动激发声光报警系统，并作相应的不合格记录。
The boards - each measuring eight metres in length - will be attached to a steel ring suspended from surrounding trees by stainless steel cables.
这些木板——每块长8米——将由不锈钢绳索吊在周围树上的钢环上。
Based on the bench test, a system is developed for measuring the variation of the friction between piston ring and cylinder liner.
作者结合发动机试验台，设计了一套对活塞环-缸套动态摩擦力进行采集的装置。
Based on the bench test, a system is developed for measuring the variation of the friction between piston ring and cylinder liner.
作者结合发动机试验台，设计了一套对活塞环-缸套动态摩擦力进行采集的装置。
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