我们把它理解为一个横截面的序列，而不是随着时间有机地变化的东西。
We understand it as a sequence of cross-sections rather than something that somehow organically changes through time.
在地球上，人们认为，表明太阳黑子周期最可靠的迹象之一是树木的生长速度，就像树干横截面上可见的年轮一样。
On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow, as seen in the rings visible in the cross sections of their trunks.
别里耶夫选择了悬臂式上单翼和双阶船身的结构，后者具有较大的横截面。
Beriev chose a scheme of the single-cantilever monoplane with two-step boat, which had a large cross-deadrise.
投标者只能看到牛肋骨的横截面。
减小长度、增加横截面，称为镦粗金属。
Decrease length, increase cross-section, called upsetting the metal.
增加长度、减小横截面，称为延伸金属。
Increase length, decrease cross-section, called drawing out the metal.
棒子的横截面积，成反比。
Inversely proportional to the cross-sectional area of the rod.
吸收项也是相对直接的，宏观吸收横截面乘以流量。
The absorption term also is relatively straight forward, macroscopic absorption cross section times the flux.
你拿流量乘以横截面，平均它，乘以它除以总容积。
You take the flux, multiply it by the cross section, average it, integrate it over the whole volume.
杆件的横截面积不能为零。
这些要求表现了计算机科学课程的一个很好的横截面。
These requirements represent a pretty good cross-section of the CS curriculum.
现在，这是横截面的函数，这是在坐标图的能量函数。
Now this is a function of cross section, this is a function of energy on a log plot.
那么横截面就等于,8乘以10的,负五次方平方米。
That would give me a cross-sectional area of eight times ten to the minus five square meters.
飞机的长度和最大横截面面积之比也会影响音爆的强度。
The ratio of aircraft length to maximum cross sectional area also influences the intensity of the sonic boom.
所以这就是股骨的长度,这是它的厚度,这是它的横截面积。
So this will be the length of the femur d and this will be the thickness, d A and this will be the cross-sectional area A.
横截面的平滑转变避免了死空间，并且使压力损失达到最小。
The cross sectional transitions are smooth to avoid dead spaces and minimize pressure loss.
由部件，横截面和连接组成的结构关键部件的破裂，原因有。
Rupture of critical parts of a structure comprising components, crosssections and connections, for instance by.
在这些研究中，各段变形被描述成横截面的宽度和高度的变化。
In these studies, sectional deformation has been presented as the change of width and height of the cross-section.
这样，我们就是在学习一个个语言的横截面，而不是语言自然的变化过程。
In that case, we understand it as a sequence of cross-sections rather than something that somehow organically changes through time.
捷克斯洛伐克摩拉维亚DolneVestonice一间棚屋的横截面。
Cross-section of a hut found at Dolne Vestonice, Moravia, Czechoslovakia.
那是被测量的，作为吸收热能的，宏观横截面，除以全部的，吸收的能量的乘积。
And that is measured as a macroscopic cross section of absorption thermal divided by the integral of all energies in terms of absorptions.
现在，我们将要在这节课完成的，就是一些基础像是横截面，裂变过程的基本原理。
Now what we're gonna cover in this lecture are some basics such as cross sections, the fundamentals of the fission process.
所以，如果你得到一定的容积,你有一定量的材料，我们就把裂变横截面当做问题。
So if you take a certain volume and you have a certain amount of material, let's just take the fission cross section as the issue.
现在，当你看铀的横截面，是以能量的函数，那是中子能量，从电子伏到兆电子伏水平。
Now when you look at uranium cross section as a function of energy and that's this neutron energy from EVs to MEV levels.
你们有我们称为总横截面的,那是散射或者吸收的总概率,这些是我们要谈论的,2个现象。
You have what we call a total cross section which is the total probabilities of either scattering or absorption. These are the two phenomenon that we are talking about.
我们用矢量图形程序测量了横截面的放大照片，在下图中可以清晰的看到割断绳子的锋利边缘。
An enlarged photo of the cross section cut was then traced with a vector graphics program.The sharp edges, one of which severed the rope, are clearly shown in the illustration.
它有着怪异的夹角(令人回忆起隐形轰炸机)，以减小雷达横截面，并且涂抹了雷达吸波材料。
It has odd angles (reminiscent of a stealth bomber) to reduce its radar cross-section, and was coated in radar-absorbing material.
如果你们数的话，原子核的数是，我们用它乘以πr的平方，得到横截面积，除以1。
So, the number of nuclei, 119 if we were to sit and count these as well, is 119. So, we'll multiply that by just pi, r squared, to get that cross-section, and divide all of that by 1 .
这个图表给你们一个重要的,可裂变和可转换核素的,一些临界热能中子横截面的总结。
This chart gives you a summary of some of the critical thermal-neutron cross sections of important fissile and fertile nuclides.
这个图表给你们一个重要的,可裂变和可转换核素的,一些临界热能中子横截面的总结。
This chart gives you a summary of some of the critical thermal-neutron cross sections of important fissile and fertile nuclides.
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