在20世纪的30年代，保罗·狄拉克甚至向我们提出了一个相信单磁极存在的比较充分的理由，他表示单极的存在可以反过来解释电子的存在。
In the 1930s, Paul Dirac gave us an even better reason to believe in monopoles, when he showed that their existence would in turn explain the existence of electrons.
它只是一个巧妙地通过衰变成锇和钽而假装成磁单极子的普通的铂原子核。
It was just a garden variety platinum nucleus pretending to be a monopole by cleverly decaying into osmium and tantalum.
但他不能指望能马上找到它：磁单极子已经逍遥于我们最好的一批物理学家之法外达几世纪了。
And he would be right. But he shouldn't count on finding one right away; magnetic monopoles have eluded our best scientists for centuries.
简言之，日本正切身体验到，没有单极美国强权的情况下，亚洲沿海地区将会怎样。
In short, Japan is getting real-life experience of what maritime Asia would be like without unipolar America power.
所以这些单极在粒子加速器里或者在高空大气宇宙射线的碰撞过程中可能会被找到。
So these monopoles could well turn up in our particle acceleratorsor in the decay products of cosmic ray collisions in the upper atmosphere.
第二种变化在于，美国所扮演的单极世界中唯一一极的角色正在不可避免地走向终结。
The second is that America's role as the single pole of a unipolar world is inevitably coming to an end.
“既然磁单极子是与量子力学相一致，所以它们应该是存在着的”，米尔特说。
"Magnetic monopoles are consistent with quantum mechanics; therefore they should exist," says Milton.
有一段时间，美国的力量曾遭到苏联的制衡，但自从冷战结束之后，美国已经成为单极世界的唯一超级大国。
For a while, U.S. power was checked by the Soviet Union, but since the end of the Cold War, America has been the sole superpower.
其中一个不稳定因素与美国在国际体系中的单极地位有关。
One destabilizing factor has to do with American unipolarity in the international system.
这种统一是指你不能拥有一个而不拥有另一个，它就像一块磁铁的南北两极。你不能拥有一个单极磁铁。
If you cannot have one without the other, it is like the north and south poles of a magnet.
“俄罗斯又回来了，自我1981年第一次访问俄罗斯，俄罗斯精英们大踏步前进的步伐中带进了更多的跳跃，他们受够了美国的单极主义。”
The Russian elites have more spring in their step than at any time since my first visit there in 1981, and they've had enough of U.S. unilateralism.
从本质上讲，国际上围绕NMD问题的争论，是关于建立何种国际秩序的争论，是单极与多极之争。
The international debate around the NMD issue is, in essence, about what kind of international order should be established, and a choice between unipolar and multipolar world.
也许欧洲核子研究中心(CERN)的大型强子对撞机的一个既定实验将在超高能质子碰撞中找到磁单极子存在的证据。
Perhaps a planned experiment at CERN's Large Hadron Collider will find evidence for magnetic monopoles in the collisions of ultra-high-energy protons.
福尔摩斯插话说，“哦，”他赶在青年询问自己的这番迅捷而又准确的推理的原委之前说道，“哦，道理简单极了。
"Oh, " he went on before the other could ask the reasons of his swift and accurate deductions, "oh, it's very simple.
不过，英特尔公司拥有大量聪明人，他们有能力发明使用新材料的单极型晶体管”。
But there are a lot of smart people at Intel and they were able to reinvent the CMOS transistor using new materials.
这个屋子里的大多数人、在大多数时间所经历的单极世界的时代已经一去不复返了。
The globe is no longer going to be mono-polar in the way it has been for most of the life times of most of the people in this room.
享乐主义者是最谨慎的时间旅行者，他们会跟随吉本前往古罗马，或是计算好自己出生的时间来躲过世界大战的征兵，同时又尽情享受美国单极主导下的和平时代。
Epicures, the most prudent time-travellers, will follow Gibbon to Rome, or time their birth to dodge a call-up for the world wars and surf the Pax Americana.
物理学家们已经成功制造出磁单极子的对应物，然而，用的材料是叫做“自旋冰”的诡异物质。
Physicists have succeeded in creating analogs of magnetic monopoles, however, in exotic materials known as "spin ice."
Sheldon是搞弦论的理论物理学家，而弦论也预言了磁单极子的存在。
Sheldon is a string theorist, and string theory also predicts the existence of magnetic monopoles.
至于背景中白色写字板上的那些公式，已经成为每周新的一集的主要部分，Saltzberg提供了描述磁单极子的经典图像和方程。
As for the white board equations in the background that have become a staple of each weekly episode, Saltzberg provided classic diagrams and equations describing magnetic monopoles.
单极世界中，你认为人们拥有足够的自由和渠道去发表意见吗?。
Under unipolarity, do you believe that people have enough freedom and channels to express their opinion?
特别地，磁单极子可以存在于称为“Dirac弦”的，也就是携带磁场的长管的两端。
Specifically, monopoles could exit at the ends of long tubes carrying magnetic fields called "Dirac strings.
正如Saltzberg所说，自jamesClerkMaxwell(詹姆士·克拉克·麦克斯韦)首先提出他那著名的四个描述电磁场的方程以来，科学家们便着迷于磁单极子的探查中。
As Saltzberg says, scientists have been tantalized by the prospect of magnetic monopoles since James Clerk Maxwell first formulated his famous four equations describing electromagnetism.
绕组广泛或有4个或6或单极与双极驱动器使用的连接可用。
Wide range or windings available with 4 or 6 connections for use with bipolar or unipolar drives.
绕组广泛或有4个或6或单极与双极驱动器使用的连接可用。
Wide range or windings available with 4 or 6 connections for use with bipolar or unipolar drives.
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