在空中

The flow of Non-newtonian fluid in eccentric annuli with the inner cyinder moving axially and it's application in preventing pumping rod and oil tube from eccentric wear in a polymer-driving well are studied in this paper.

在采油过程中，由于油井较深的缘故，抽油杆在油管中是处于偏心位置的，聚驱井产出液在抽油杆做轴向运动的井筒中的流动问题就是非Newton流体在内管做轴向运动的偏心环空中的流动问题。

In the subtle gap between breaths, you are at your center.

在那空中，在吸气和吐气之间，你在你的中心。

And when the evening mist clothes the riverside with poetry, as with a veil, and the poor buildings lose themselves in the dim sky, and the tall chimneys become campanili, and the warehouses are palaces in the night, and the whole city hangs in the heavens, and fairy-land is before us——then the wayfarer hastens home; the working man and the cultured one, the wise man and the one of pleasure, cease to understand, as they have ceased to see, and Nature, who, for once, has sung in tune, sings her exquisite song to the artist alone, her son and her master——her son in that he loves her, her master in that he knows her.

到了晚上，薄雾用诗歌穿上了一层面纱，矮小的建筑迷失在昏暗的天空下，高大的烟囱变得更加突兀，仓库置于夜色中，整个城市悬挂在天空中，所谓的人间仙境就在我们眼前——旅客也因此加快了回家了脚步；无论是工人、知识分子，还是哲人或者消遣的人，都停止了思考，仿佛他们已经不再看得到。这一次自然唱得是那么优美动听，她为艺术家一人唱着优美的歌曲。把他当做她的孩子，她的家长——之所以说她的孩子是因为他爱她，而说是她的家长是因为他懂她。

And when the evening mist clothes the riverside with poetry, as with a veil, and the poor buildings lose themselves in the dim sky, and the tall chimneys become campanili, and the warehouses are palaces in the night, and the whole city hangs in the heavens, and fairy-land is before us——then the wayfarer hastens home; the working man and the cultured one, the wise man and the one of pleasure, cease to understand, as they have ceased to see, and Nature, who, for once, has sung in tune, sings her exquisite song to the artist alone, her son and her master——her son in that he loves her, her master in that he knows her.

当夜幕为河滨蒙上一层诗意般的薄雾之时，潦倒的建筑在昏暗的天穹下像被什么东西盖住一样看不见了，高耸的烟囱变得像一座钟楼一般，仓库在黑夜中看起来像座雄伟的宫殿，整座城市悬挂在天空中，给人如置身仙境般的感觉。旅人加快了归家的步伐；忙于工作的人，聪慧和有学识的人还有快乐的人们理解不了其中的奥秘，因为他们从没用心眼去观察过自然界。而自然只曾为孤独的艺术家——她的儿子，那个大师高歌一曲，因为只有艺术家爱着她，深深了解她。

And when the evening mist clothes the riverside with poetry, as with a veil, and the poor buildings lose themselves in the dim sky, and the tall chimneys become campanili, and the warehouses are palaces in the night, and the whole city hangs in the heavens, and fairy-land is before us——then the wayfarer hastens home; the working man and the cultured one, the wise man and the one of pleasure, cease to understand, as they have ceased to see, and Nature, who, for once, has sung in tune, sings her exquisite song to the artist alone, her son and her master——her son in that he loves her, her master in that he knows her.

夜晚的雾气湿润了衣服，河畔雾气缭绕，充满诗情画意，陈旧的建筑物云雾环绕，渐渐消失在灰蒙蒙的天空中。高高的烟囱在雾气中好似钟楼，连夜色中的仓库也变成了辉煌的宫殿，整座城市仿佛悬浮于空。在我们眼前的就是仙境----路上行人匆匆；无论是工作者，文学者，干练者还是享乐者，已经停止了观察自然，进而停止了理解自然。然而自然还是动情歌唱，把她最优美动听的歌声献给她唯一的艺术家，她的儿子和主人----说他是儿子是因为他爱她，说他是主人是因为他懂她。

The strange objects were gray-black and didn't make any noise.

2003年5月17日荷兰。2003年5月17日多人目击了这个奇怪的UFO，一位今年36对的司机，使用自己的惠普620数码相机拍摄了一些照片，时间在13：45，据他说，当时空中有一个较大的物体和两个小的物体，两个小的物体似乎被大物体的智能的控制着，他们之间的距离在300米左右，物体离地面在350米左右。

Rescue crews use cherry pickers Monday night to remove riders stranded between 40 and 80 feet off the ground on a roller coaster at a northern California theme park.

周一晚上在位于加州北部地区的一家主题公园里，营救人员通过吊车起重机把坐在过山车的乘客解救下来，此前他们被吊在离地40英尺至80英尺的半空中。

Throughout the last quarter of the 19th Century aerial researchers built and tested models to determine in a scientific manner which designs and which approaches would be most likely to succeed in carrying humans aloft in a heavier-than-air flying machine.

在整个去年第四季的19世纪空中研究建立和测试模型，以确定在科学地设计和哪些方法可将最有可能成功地进行人类高举在加重了比空气的飞行机器。

By establishing a model based on the law of infrared radiation transmission in atmosphere and the characteristics of infrared imaging system for the apparent contrast between the target and the background, and analyzing the model over two wavebands to formulate the distance measuring formula and the distance resolving power formula, a passive distance measurement method is proposed for aerial point target distance measurement.

提出了对空中点目标进行被动测距的方法。基于红外辐射在大气中的传输规律和红外成像系统的特性，建立了目标和背景的表观对比度模型。通过对两个波段上对比度模型的分析，推导出了测距公式和距离分辨率公式。理论分析表明，只要得到大气在两个波段上的消光系数，通过测量目标在两个波段、两个时刻上的目标表观对比度，即可计算得到目标距离和目标径向速度，而距离分辨率则取决于系统的对比度探测能力及相关参数。

In this long-exposure photograph, two girls spin sparklers in the air on October 15th, 2009, ahead of Diwali, the Hindu festival of lights, in Ahmadabad, India.

在这个长期暴露照片，两个女孩在旋转于10月15日空中电光花，2009年之前，灯节，是印度教的灯节，在艾哈迈达巴德，印度。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐