自转

The most important work of this thesis is to evaluate evolutions of the star, we mainly focus on the spin evolution.

在这篇论文中我们最重要的工作就是计算了星体的演化，主要是自转演化。

By using the NCEP/NCAR (National Center for Environmental Prediction/National Center for Atmospheric Research) reanalysis of daily with the horizontal resolution of 10°×10°(lat./lon. grid), the representative Pacific area (0°～ 60°N, 160°E～120°W) in northern hemisphere summer is chosen to analyse the 3D wind field, according to which the mean meridional circulation of the lower and middle latitudes, especially the Ferrel cell, is studied and a new concept model of Ferrel cell is carried out. Compared with the classical model, the new one describes more precisely the low and high level winds and has the ability to describe how the westerlies sustain on the real rotating Earth.

本文利用1998～2003年的NCEP/NCAR（National Center for Environmental Prediction/National Center for Atmospheric Research，美国国家环境预报中心/美国国家大气研究中心）再分析资料（10°×10°，经/纬度网格），根据北半球夏季（6～8月）太平洋地区（0°～60°N；160°E～120°W）的三维风场的基本特征，分析了北半球夏季太平洋地区平均经圈环流，特别是Ferrel环流的特征，发现Ferrel环流具有与已往研究不同的性质，并在此基础上提出了Ferrel环流新的概念模型，与过去的经典的环流概念模型相比能较好地描述高低空环流的基本特征，同时在考虑地球自转效应下，能够完满地解释中高纬度西风带的维持。

By using the NCEP/NCAR (National Center for Environmental Prediction/National Center for Atmospheric Research) reanalysis of daily with the horizontal resolution of 1.0°x1.0°(lat./lon. grid), the representative Pacific area (0°~60°N, 160°E~120°W) in northern hemisphere summer (Jun-Jul-Aug) is chosen to analyse the 3-D wind field, according to which the mean meridional circulation of the lower and middle latitudes, especially the Ferrel cell, is studied and a new concept model of Ferrel cell is carried out. Compared with the classical model, the new one describes more precisely the low- and high- level winds and has the ability to describe how the westerlies sustain on the real rotating Earth.

本文利用1998~2003年的NCEP/NCARNational Center for Environmental Prediction/National Center for Atmospheric Research，美国国家环境预报中心／美国国家大气研究中心）再分析资料（1.0°×l.0°，经／纬度网格），根据北半球夏季（6~8月）太平洋地区(0°~60°N； 160°E~120°W的三维风场的基本特征，分析了北半球夏季太平洋地区平均经圈环流，特别是Ferrel环流的特征，发现Ferrel环流具有与已往研究不同的性质，并在此基础上提出了Ferrel环流新的概念模型，与过去的经典的环流概念模型相比能较好地描述高低空环流的基本特征，同时在考虑地球自转效应下，能够完满地解释中高纬度西风带的维持。

In making the armwith the front fork-shaped tray for information, In order to ensurethat information from the tray in the mouth with the switch to armthe public also reverse rotation itself, using a roundaboutsynchronous devices, from the chain drive to achieve.

在转臂前端装有叉状的取料托盘，为了确保托盘的取料口在随转臂公转的同时又本身反向自转，采用了同步回旋装置，由链传动实现。

In making the arm with the front fork-shaped tray for information, In order to ensure that information from the tray in the mouth with the switch to arm the public also reverse rotation itself, using a roundabout synchronous devices, from the chain drive to achieve.

在转臂前端装有叉状的取料托盘，为了确保托盘的取料口在随转臂公转的同时又本身反向自转，采用了同步回旋装置，由链传动实现。

The measurement of time first originated and is based on the earth's motion upon its axis. One of the smallest cycles, or time factors, which repeats regularly in things that are very active and have a high vibration, is the four-minute cycle.

时间的度量基于地球围绕其轴线的自转，四分钟循环是最小的循环之一，是事物不断重复自身的最活跃的一种频率。

The rotation of a hurricane is a product of the Coriolis force, a natural phenomenon that causes fluids and free-moving objects to veer to the right of

受地球自转偏向力影响，北半球的台风朝逆时针方向旋转，南半球却是顺时针，并朝北极方向移动。

As a result, a full rotation of the workpiece is produced by 40 full revolutions of the index crank.

结果，制件的充分的自转由索引曲柄的40次充分的革命引起。

The mechanical leveling system can realize accurate leveling of the platform by servo-motors and drive system, braking by motor brake (worm and worm wheel system features self-locking) to permanently lock the support system after leveling. Bellows outside outriggers functions sealing and dust-proof of the screw rod; guiding slide blocks are used to prevent screw rod from rotating; displacement sensors installed inside drive system deliver real-time information to determine platform height; load cells deliver data of loading conditions of every outriggers in balancing.

平台机械调平系统通过伺服电机、传动系统可实现对平台的精确调平，并通过电机制动器制动（蜗轮蜗杆系统也具有自锁特性），对调平后的支撑系统进行长期锁定；支腿外部的波纹管可实现丝杠的密封防尘；支腿上部的导向滑块可防止丝杠自转；支撑驱动系统内部安装的位移传感器随时传递信息确定台面的高度；荷重传感器为平衡各支腿的受力状态传输数据。

Simulated views of the Moon over one month, demonstrating librations in latitude and longitude.

经天平动是因为地球不在月亮的轨道的中心，而且月亮公转的速度不象自转速度那么均匀等原因导致的。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。