第一差别

We performed a simulative test, which confirms that wavelet analysis can separate annual wobble and Chandler wobble. Our results show that this method can be used in astronomical geodynamies effectively. This paper is divided into two parts. The first is about statistic characteristic of polar motion. Polar motion includes secular motion, long period fluctuations, Chandler wobble, annual wobble and high frequency wobble. The secular motion is 3.4mas/year and towards 760W meridian. Long period fluctuations have difference periods in x-axis and y-axis. They are 31.7-year and 24-year in x-axis and 28.5-year and 22.9-year in y-axis. These 2~? decades fluctuations have an amplitude of about 30 mas , and are very nearly linearly polarized, with the observed motion of pole being almost entirely along a line between 360E and 1440W. There is a 55.4-year wobble whose amplitude is 9 mas. The amplitude of the interannual fluctuations is about 4? mas. The amplitude of long period fluctuations decreased after 1970. The annual wobble is a steady wobble. It retrograde wobble is only 1/20 of prograde wobble in amplitude.

本文的工作主要分为两部分：第一部分是通过分析POLE97序列，我们对极移的统计特性有了一个较全面的认识，极移主要包括趋势项、长周期项、Chandler项、周年项和高频项：趋势项的方向是西经76°，速度为每年3.4mas；长周期项中Markowitz 项在X、Y两个方向有不同的周期，它们分别是：X方向的两个周期是31.7年和24 年，Y方向的两个周期为28.5年和22.9年它们叠加在一起是一个线偏振运动，最大振幅约为30mas，偏振方向在西经144°和东经36°之间；极移的长周期波动中还存在一个 55.4年周期的圆周运动，振幅约为9mas；十年尺度变化的振幅在4～6mas之间，在Y 方向十年尺度的成份比较多，它们的周期在X方向和Y方向不是对应的；从七十年代年开始长周期变化的振幅明显降低；周年项是一个振幅稳定的摆动，在X、Y两个方向的振幅略有差别，逆向运动振幅大约为顺向运动振幅的1/20；Chandler摆动的振幅自1900年以来经历了几次较大的变化，其中包括1915年和1955年两次极大值，振幅分别达到0&。25和0&。28，以及1925～1940期间小于0.09的过程，Chandler项在X、Y 两个方向的振幅几乎完全相等，其逆向运动振幅不到顺向运动振幅的1/50。

One study at Lee University found that first-semester grades of teenage students who had always attended public, tax-supported schools were slightly lower than the grades of students who had received some home schooling instruction by parents at home, although the grade differences disappeared in the second semester.

Lee University，论断：政府应该提供经费鼓励，因为家庭教育很更多父母来说并不是必须的。因为一项在L大学的研究发现，参加公共或税收支持的学校的学生第一年的成绩比其他在家由父母指导的孩子成绩稍差，尽管这种成绩上的差别在第二年会消失。

For Mr. Obama, who has been taking pains to strike a conciliatory note during his first visit to China, it was a rare challenge to Chinese authorities, but expressed in Mr. Obama's now familiar nuance.

对于第一次访华期间就不厌其烦地取得和解约定的奥巴马先生，这对中国当局来说是少有的挑战，但是现在奥巴马的表现与平常略有差别。

Evolutionary continuum – some psychologists , such as the behaviourists,claimed that animal research was justified because humans have evolved from other animals and so the difference between them is only quantitative.since humans are just more complex animals,it makes sense to study more simple organisms first,and then generalise to humans by 'scaling up'the results.

连续进化-一些心理学家，如b ehaviourists声称，动物研究是有道理的，因为人类已经从其他动物，因此两者之间的差别只是q uantitative.since人类只是更复杂的动物，它的研究意义更为简单的生物体第一，然后归纳到人类的'尺度up'the结果。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。