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They are the four vanguards of the human race, marching towards the four cardinal points of progress.

但是，在哲学家的身旁和底下，有那些诡辩派，这是杂在香花中的毒草，是处女林中的霸王鞭。

In September 1704, by the name of a Scottish sailor Alexander Selkirk was abandoned in South America, the captain of methylamphetamine in the Atlantic island of South Devon, in this desolate and uninhabited island spent four years and four months.

鲁滨逊漂流记》是根据真人真事加以改编创作的。1704年9月，一个名叫亚历山大·塞尔柯克的苏格兰水手被船长遗弃在南美洲大西洋中的安·菲南德岛上，在这个荒无人烟的海岛上度过了四年零四个月。

For four yuan Bridge, the four-Bridge, Shibalidian bridges Block 13 overpass around the green belt and Chaoyang Park, the red scarf Park, fired criminal Lake Park, 18 large public green spaces, garden experts in the design, determine to planting large trees specifications mainly determined 2-3 keynote species and 7-8 major species to the natural-style tablet Hunjiao, a large group of ambitious momentum for the City of Victoria Road green spots become all Parts of the show.

对于四元桥、四惠桥、十八里店桥等13座立交桥的周围绿化带和朝阳公园、红领巾公园、窑洼湖公园等18个大型公共绿地，园林专家们在设计上，确定以栽种大规格乔木为主，确定2至3个基调树种和7至8个主要树种，以自然式片状混交、大型组团方式形成宏大的气势，让这些景点成为四环路绿化全线的精彩片段。

It is 65 cm long, with four axles and four strings and 12 timbres on the neck and faceplate.

彝族地区还流行一种音箱呈扁八角形的月琴，叫&弦子&或&八角琴&。

To increase the security of the watermark, a new binary image encryption algorithm based on TD-ERCS map is presented. The watermark is encrypted by a chaos sequence generated by TD-ERCS map; A novel color image watermarking algorithm is proposed based on discrete chaotic map and 2-dimensions discrete wavelet transform. The watermark is encrypted by the new binary image encryption algorithm, and the encrypted watermark is embed into four sub-bands of the most deep level of blue branch of host image by three-level wavelet transform, and the embedded positions are determined by general cat cha otic map; A novel color-image blind detection watermarking algorithm is proposed based on integer wavelet transform and subsampling. The scrambled watermark is encrypted and embed into the low sub-bands after four sub-images of the Y branch of host image is transformed by two-level wavelet transform, and the embedded positions are determined by Logistic chaotic map, this watermarking scheme can realize blind extraction.

为了提高水印图像的安全性，提出了一种基于TD-ERCS混沌映射的二值水印图像的加密算法，该算法利用TD-ERCS映射产生的混沌序列加密水印图像；将离散混沌映射和二维离散小波变换相结合，研究了彩色图像水印新算法，该算法先对混沌序列加密后的水印图像进行小波变换，再嵌入到宿主图像的蓝色分量的最深层的四个子带中，嵌入位置则由广义猫映射确定；将整数小波变换和图像子采样技术应用于数字水印，提出了一种彩色图像盲提取水印算法，水印嵌入时，先对宿主图像在YIQ色彩空间中的Y分量进行子采样，并对得到的四个子图像分别进行二级离散小波变换，然后将置乱并加密后的水印图像嵌入到小波变换后的低频子带中，其嵌入位置由Logistic混沌映射产生的混沌序列确定，实现了水印的盲提取。

WASHINGTON - Scientists unearthed a skull of the most primitive four-legged creature in Earth's history, which should help them better understand the evolution of fish to advanced animals that walk on land. The 365 million-year-old fossil skull, shoulders and part of the pelvis of the water-dweller, Ventastega curonica, were found in Latvia, researchers report in a study published in Thursday's issue of the journal Nature. Even though Ventastega is likely an evolutionary dead-end, the finding sheds new details on the evolutionary transition from fish to tetrapods. Tetrapods are animals with four limbs and include such descendants as amphibians, birds and mammals.

华盛顿-科学家挖掘出一副地球历史上最原始的四足生物头骨，这个有利于帮组他们更好理解鱼类进化成为更先进的陆地行走生物，这个有着三亿六千五百万年年龄的头骨，肩膀和水生生物的一部分骨盆，Ventastega curonica，在Latvia被发现，研究者一篇研究报告发表在在星期三出版的自然杂志上，尽管Ventastega 可能是一个进化的死胡同，这个发现给出了从鱼类到四足动物进化变迁过程的新细节，四足动物是使用四肢的动物并且包括下属的比如两栖类动物，鸟类和哺乳类动物。

The University's sports facilities include a 50-metre swimming pool; athletics track; rugby, soccer and hockey pitches; cricket square; tennis courts (four indoor, four outdoor which are floodlit); three squash courts; eight-court sports hall; large fitness centre; nine-hole golf course; putting green; golf driving range; and a loch for sailing, windsurfing and canoeing.

运动设施包括一座50公尺长的游泳池、运动场、英式橄榄球、足球、区棍球场、板球场、网球场（室内室外各四座用泛光灯照明）3个回力球场、运动馆、健身中心、高尔夫球场、以及供水上航行、风浪板和独木舟活动的一座湖。

These last four paths are referred to in the sutras as the Four Paths of Misery.

&这些过去四年路径中提到的经典的&四种途径的苦难。

First, let me say, that with doing four hand spankings and four strappings, Lady D has stamina!

首先呢，我觉得用手打四次屁股然后用皮带打四次，Lady D的耐力真的是很好！

Have been selected as statistical index, realizing for the first time the quantitative analysis of the high speed railway capacity with mixed high and medium speed train operations, and the huge amount of plannings of would be unimageable under the condition of manual drawing In the analysis four prime factors--the fleeting interval of high and medium speed trains, the matching of speed for high and medium speed trains, the number of inter-mediate stoppings and the train performance approach, have been given special analysis And a quantitative analysis has been made for the first time with regard to the impact of the variation of above four factors on the demand for the high speed train sets, and concerning conclusions have been drawn from the quantitative analysis.

其中着重分析了高中速列车追踪间隔、高中速列车速度匹配关系、中间站设置数量、组织方式等四个影响通过能力的主要因素。同时，首次定量分析了上述因素的变动与高速动车组需求数量间的关系。此外，从上述量化研究中得出了有关结论。

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。