不圆

A new mathematical model is put forward numerically to simulate the wheel ovalization.. In the numerical simulation, the dynamic model of a half railway vehicle coupled with a tangent track is employed. Using the new numerical method investigates vehicle-track coupling system dynamic responses including lateral and vertical displacement of wheelsets and the vehicle, lateral and vertical vibration acceleration of the track at different phase angle of the two side wheels of the same wheelset, which are compared with that of the traditional model. The numerical results show that the discipline and frequency of dynamic responses are accordant, amplitude and phase of lateral dynamic responses are different. It is concluded the traditional track geometric irregularity excitation model does not simulate the effect of periodic wheels ovalization on vehicle-track coupling system dynamic behavior truly, the new model is more accurate and reasonable.

本文研究了车轮二阶周期性非圆化—椭圆化，建立了一个新的模拟车轮椭圆化的数学模型，结合车辆－轨道空间耦合动力学模型，计算了同一轮对左右车轮不同相位和车轮椭圆度下轮对和车体的横、垂向位移，钢轨横、垂向振动加速度，并与传统模型计算结果作了对比，分析表明两种模型的动力响应变化规律和频率一致，但横向动力响应幅值和相位均存在不同程度不可忽略的差异，因此传统的轨道几何不平顺激励模型不能真实模拟车轮的周期性椭圆化对车辆－轨道耦合动态行为的影响，而本文模型更能反映实际椭圆车轮与钢轨接触情形，计算方法准确而合理。

The cells ovoidal, while budding the wall structure is entroblastic. Reproduction by multilateral budding. It is not form ascospores or ballistospores; on malt agar red carotenoid pigments is synthesized.

该菌株细胞卵圆，出芽时胞壁结构为内分芽型，多端芽殖，不产生子囊孢子和掷孢子；在麦芽汁琼脂上产生红色胡萝卜素，颜色反应阳性，菌落平滑，有光泽，质地软而呈粘液状，不发酵任何糖，能同化麦芽糖、蔗糖、乳糖、棉子糖、松三糖和硝酸钾，能分解尿素；细胞水解物中含甘露糖、葡萄糖和半乳糖。

At constant viscosity, by increasing the liquid flow rate, the liquid film's velocity is increased; at the same experiment condition, the frequency of the liquid film is same at the same radial direction; the air current has minimum effect on liquid film bottom flow velocity, while it has an obvious effect on liquid film surface flow velocity. The longer the distance between liquid film and the inlet, the lower the pulsatory frequency and longer the wavelength.

在粘度基本不变的情况下，随着液体质量流率的增加，液膜流动速度随之增加；在同一个实验条件下，沿圆管径向各质点的频率基本保持不变；气流场速度对液膜底层流动速度影响很小，对于液膜表面流动速度有着较大的影响；沿液膜流动方向，液膜的脉动速度逐渐增加，脉动频率降低，脉动波长变长，与报道的通过快速摄像得到的液膜发展趋势一致，证实用PDA研究液膜流动是可行的。

Muzzle shorter than skull, neither coarse nor snipy, but with rounded cushions.

口吻略短于脑袋，既不粗糙，也不细长，带有圆弧形的下巴。

Her face was a shade too long and narrow, but this shortcoming was amply compens at ed by an at tractive mouth, a shapely chin -neither too pointed nor too round-and long,, wavy hair hanging loosely over her shoulders

也是一张稍显得狭长了些的脸庞，可是那十分可爱的红嘴唇，不太尖也不太圆的下巴，以及那一头烫成波浪形松松地齐到耳根的长头发，却把脸庞的狭长&病&完全补救了。

Unlike most of the other desert plant species, which have small leaves so as to minimize moisture loss, this plant is unique in that its leaves are particularly large; each plant's rosette of one to four leaves reaches a total diameter of up to one meter. Prof. Simcha Lev-Yadun, Prof. Gidi Ne'eman and Prof. Gadi Katzir came across this unique plant growing in the desert while studying the field area with students of the Department of Science Education-Biology of the University of Haifa-Oranim, and noticed that its leaves are unusually large and covered with a waxy cuticle.

不同于其他大多数沙漠植物，利用小的叶片来减少水分的散失，这种植物的叶片特别的大，一株沙漠大黄可以有1到4片圆盘状的叶片，直径最多可达1m，海法大学的教授Simcha Lev-Yadun、Gidi Ne'eman和Gadi Katzir在带领学生在此地作调查的时候发现了这种植物，他们发现这种植物的叶子不寻常的大，并且覆盖了以层蜡质。

It is not domed but not absolutely flat between the ears.

耳朵之间不很圆拱，但也不是绝对的平坦。

In other words, everything costs something and everything has to be paid for by someone; statements otherwise are ploys for gulling credulous people.

布什不是去处理赤字问题，反而在吹捧自己为老年人(也就是喜欢玩推圆盘游戏的乘客)实行的&处方药免费&的政策；免费的午餐暗指美国一句俗语&世上没有免费的午餐&，换句话说，什么东西都有价值，要想得到什么都需要付出，而与此不同的说法则是欺骗那些轻信的人们的花招，可免费的午餐在这艘美国号船上则是常规；这位总统也是一个对美国宇航局在月球建立载人基地以及推进火星开发计划的拥护者---航天飞机可不是便宜的；向&所有不需要钱的人&给予&现金奖励&指的是布什的一大堆减税政策。

Rather than dealing with the deficits, Bush touts his policy of "free prescription drugs" for the elderly -- the passengers among whom the game of shuffleboard is popular."Free lunch" alludes to the American saying "There's no such a thing as a free lunch." In other words, everything costs something and everything has to be paid for by someone; statements otherwise are ploys for gulling credulous people. But free lunch is the order of the day on the USS Union②. The president is likewise a fan of NASA's project to establish a manned base on the moon and push on to the exploration of Mars;that "spaceship" will not be cheap. And the "cash awards" for "all who don't need them" could refer to a host of Bush tax cuts.

布什不是去处理赤字问题，反而在吹捧自己为老年人(也就是喜欢玩推圆盘游戏的乘客)实行的&处方药免费&的政策；免费的午餐暗指美国一句俗语&世上没有免费的午餐&，换句话说，什么东西都有价值，要想得到什么都需要付出，而与此不同的说法则是欺骗那些轻信的人们的花招，可免费的午餐在这艘美国号船上则是常规；这位总统也是一个对美国宇航局在月球建立载人基地以及推进火星开发计划的拥护者———航天飞机可不是便宜的；向&所有不需要钱的人&给予&现金奖励&指的是布什的一大堆减税政策。

Rather than dealing with the deficits, Bush touts his policy of "free prescription drugs" for the elderly -- the passengers among whom the game of shuffleboard is popular."Free lunch" alludes to the American saying "Theres no such a thing as a free lunch." In other words, everything costs something and everything has to be paid for by someone; statements otherwise are ploys for gulling credulous people. But free lunch is the order of the day on the USS Union②. The president is likewise a fan of NASAs project to establish a manned base on the moon and push on to the exploration of Mars;that "spaceship" will not be cheap. And the "cash awards" for "all who dont need them" could refer to a host of Bush tax cuts.

布什不是去处理赤字问题，反而在吹捧自己为老年人(也就是喜欢玩推圆盘游戏的乘客)实行的&处方药免费&的政策；免费的午餐暗指美国一句俗语&世上没有免费的午餐&，换句话说，什么东西都有价值，要想得到什么都需要付出，而与此不同的说法则是欺骗那些轻信的人们的花招，可免费的午餐在这艘美国号船上则是常规；这位总统也是一个对美国宇航局在月球建立载人基地以及推进火星开发计划的拥护者―――航天飞机可不是便宜的；向&所有不需要钱的人&给予&现金奖励&指的是布什的一大堆减税政策。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。