A closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it.
由完全相交的一个圆锥体和一个平面的交集所形成的闭合的平面曲线。
Because the airport was closed, the pilot had to land the plane in an open field.
由于机场关闭，飞行员只得将飞机降落到一片旷野里。
The plane will be landing in half an hour and the washrooms will be closed soon. You'd better use it now if you need to.
还有半个小时飞机就要降落了，洗手间马上就要关闭了。如果你要去厕所最好现在就去。
Forthe spatial synthetic operations algorithms about the closed set of polygons in the plane, this dissertation discusses the theory of the implementation and processing rules of each step in detail.
对于平面多边形的闭合集空间合成算法，本文详细讨论了实现的理论基础、各个步骤的处理规则等。
Some properties of the "super plane" in space forms are investigated, which is helpful to construct the example showing the banding properties of the closed surfaces in space forms.
而且探讨了空间型中“超平面”的性质，这对构造体现空间型中闭曲面整体弯曲程度的例子是有帮助的。
The method assigns all poles of the closed system to a special region in the left side of the complex plane to make the closed system obtain a desired degree of stability.
该方法把闭环系统的全部极点配置在复平面左半面的一个特定的区域之内，使闭环系统具有预期的稳定度。
In this paper we have discussed the situation of the variation of the singular closed trajectories with a parameter in plane rotating vector fields.
本文研究在平面旋转向量埸中，奇异闭轨线随参数变动的情况。
For the safety, the lavatories have to be closed prior to landing. Please refrain from using it until the plane lands and comes to a complete stop.
为了安全，我们在着陆前关闭了卫生间。请等到飞机完全停稳后再使用。
The trains are closed and I am not sure if I can take a plane back, or if I can reach the airport.
火车是闭合的，并且我不是肯定的，如果我可以收回飞机，或者，如果我可以到达机场。
The spatial extent of the assigned land refers to the closed space formed by the above-said boundary points posed by the vertical plane and the upper and lower elevation level.
出让宗地空间范围是以上述界址点所构成的垂直面和上、下界限高程平面封闭形成的空间范围。
This paper studies the area of plane closed folding by complex number method and proves several propositions about area of plane closed folding.
利用平面闭折线有向面积的概念和行列式的性质推广了一个面积问题。
The symmetric values about the imaginary axis of zero-poles which the unstable process lies in the open and closed right-half plane are defined as their mirror-injection.
非稳定过程在开右半平面的零极点关于虚轴的对称值称为该零极点的镜像映射。
According to the essence of Pilot Induced Oscillation (PIO) and the theory of Closed-loop control, the mathematical model of Pilot-Plane system is set up.
本文根据驾驶员诱发振荡的实质，从闭环控制理论出发，提出了人-机系统数学模型，并在时域内进行了计算。
The bottom of the disc is made of knife-shaped gate with a cut off function of the medium. When gate is closed, oblique plane of gate valve encounters wedge block of gate to achieve sealing effect.
闸板底部做成刀形斜面具有切断介质功能，而且闸板关闭时通过阀体上的锲块紧靠闸板斜切面使得闸板紧紧贴靠阀座密封面，从而起到了密封效果。
The plane will be landing in half an hour and the washrooms will be closed soon.
还有半个小时飞机就要降落了，洗手间马上就要关闭了。
It is Korean Air that we took. At first I thought I would stay nervous on the plane, but it turned out that while the plain was taking off, I felt dizzy and closed my eyes.
我们坐的是韩国航空，原本我以为在飞机上我会一直很紧张，飞机起飞一瞬间，我的头的确好晕，有些不舒服，所以就把眼睛闭起来休息，没想到连续熬好几天夜的我就这样睡著了！
The second part mainly has carried on the computation of the body elastic constants and the isolated single closed-packed plane of the rare-gas crystal.
第二部分是对稀有气体晶体的体弹性常数和孤立单一密排面的弹性常数进行了计算。
The second part mainly has carried on the computation of the body elastic constants and the isolated single closed-packed plane of the rare-gas crystal.
第二部分是对稀有气体晶体的体弹性常数和孤立单一密排面的弹性常数进行了计算。
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