圆盘的

The g eral shape of the average nebula is that of a thin circular disk somewhat thick in the center.

星云最常见的形状是中间较厚边缘较薄的圆盘。

The circular disk is somewhat easier to machine and to load than the tensile 3 specimen; moreover, if required, several calibration points can be obtained from a single load.

基於试片加工与负载的方便性，而且可以只从单一负载就可取得多点资料，所以圆盘试片受上下压力实验法是比较被推荐使用的方法。

N experiment combining flow visualization and temperature measurement is carried out in the present study to investigate the possible presence of new inertia-driven vortex rolls and some unique characteristics of the time-dependent mixed convective vortex flow resulting from a high speed round air jet impinging onto a heated horizontal circular disk in a vertical cylindrical chamber.

bstract：本篇论文利用实验流场观测方法及温度场量测方法对於垂直圆柱容器中一高速空气圆形喷流冲击至一加热圆盘之可能产生新的惯性力驱动涡流和一些独特的周期性混合对流涡流流场特性进行研究。

A type of quick-opening valve whose orifice is opened and closed by a disk that pivots on a shaft in the throat of the valve.

一种快开式阀门，其孔口的开启和关闭靠装在阀门颈部枢轴上的圆盘。

Then, the structure of vibration system is brought forward, the composite vibration system composed of conical horn and disc.

然后，提出了振动系统的构成，即圆锥形变幅杆与圆盘组成的复合振动系统。

Cylinder fertilizer feed is adopted. At the same time, disk coverer and double-directioned plow are applied. In this way, ridge forming and fertilizing are completed at the same time. the degree of mechanization is improved greatyly.

在采用圆筒排肥器深施底肥的同时，利用圆盘覆土器和正反双向两铧犁使2次起垄1次完成，解决了施肥机单一施肥，起垄机专门起垄的重复作业问题，使机械化程度大大提高。

The cyanidation rates of gold, silver and copper were compared with each other under the same reaction conditions by kinetic rotating disk method, and the influences of sulfion on them were discussed.

云南大学化学系，昆明 650091摘要：用旋转圆盘法在相同的实验条件下，对金、银、铜的氰化溶解速率进行比较研究。

At last, more than thirty million years hence, the huge red-hot 11dome of the sun had come to 12obscure nearly a tenth part of the darkling heavens.

最后，也就是距今三千多万年，太阳火红的大圆盘几乎将黑暗的天空遮蔽了十分之一。

The software has realized the techniques presented before and has other functions, such as the simulation of a disk under diametral compression, various error analysis, phase unwrapping, real-time display of image information, and so on.

本文开发形成一套与计算机设备无关的数字光弹性图像处理软件，用来实现本文提出的数字光弹性方法。附加功能还有对径压缩圆盘理论仿真模拟、各种误差分析、相位去包裹和图像信息实时显示等，它为今后进一步开发奠定基础。

The driving disk plow appearing recently is a new type of tillage equipment with high efficiency and energy saving.

驱动式圆盘犁是80年代出现的一种新型、高效、节能的耕地机具。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。