The fact that sunspots are magnetic fields accounts for their dark appearance.
太阳黑子是磁场的事实解释了它们的黑色外观。
Astronomers did eventually figure out what sunspots had to do with magnetic fields.
天文学家最终确实发现了太阳黑子与磁场的关系。
That's because magnetic fields reduce the pressure exerted on the gases inside of them, making the spots cooler than the rest of the Sun's surface.
这是因为磁场降低了施加在内部气体上的压力，使得太阳黑子比太阳表面的其他部分温度更低。
For example, magnetic fields certainly are not gradients.
举个例子，磁场就不是梯度。
I want to tell you things about electric and magnetic fields.
我将要讲电场和磁场。
Which suggests we might be able to see magnetic fields in some way.
这说明，我们可能通过某种方式看到磁场。
Normally the galaxy's magnetic fields protect us from that radiation.
正常来说银河的磁力场会保护我们免受这种辐射侵袭。
They are fast-spinning stars with extremely powerful magnetic fields.
它们是快速旋转的恒星，其周围有极强的磁场。
Sharks are among the wide array of animals that can sense magnetic fields.
鲨鱼是大批能够感知磁场的动物中的一员。
Directly detecting the magnetic fields of other stars, however, can be difficult.
然而直接探测其它恒星的磁场是很困难的。
As a result, the magnetic fields become trapped in "islands," seen here as red orbs.
结果，磁场被困在“孤岛”中，就是这里看到的红色球体。
Both craft recorded the density of particles and the strength of the magnetic fields.
两个探测器都记录了粒子密度和磁场强度。
Of course, I mean, you actually have to take some power supply to maintain the magnetic fields.
当然，实际上你必须有电源供应，用以维持磁场。
On top of that weirdness, magnetars have the added quirk of possessing extremely strong magnetic fields.
最奇怪的是，磁星竟然拥有极强的磁场。
Thus the carcinogenicity of static magnetic fields to humans is not at present classifiable (IARC, 2002).
因此，静电磁场对人类的致癌性目前尚无法进行分类(IARC, 2002年)。
Stars are spinning balls of roiling, electrically charged gas, and thus typically generate magnetic fields.
恒星是旋转着的带电气态球体，所以会产生磁场。
Specifically, monopoles could exit at the ends of long tubes carrying magnetic fields called "Dirac strings.
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。
A second technique relies on magnetic fields. It is still at an experimental stage and works using resonance.
第二类技术以磁场为依托，利用共振原理，目前仍处于研究阶段。
Focusing magnetic fields on the visual cortex of the brain caused the subjects to see luminous discs and lines.
当把磁场聚焦在大脑的的视觉皮质上时，会促使受试者看见明亮的圆盘和线条。
But now scientists have proved that human really do have a sixth sense - that lets them detect magnetic fields.
但现在科学家已证实人类确实有第六感，正是这第六感让人类能够感应到磁场。
My 12 year old had a lesson in his science course later that day that mapped magnetic fields of a little bar magnet.
当天的晚些时候，我12岁的大儿子在他的自然科学课上绘制了一幅磁铁的磁场分布图。
Currents create magnetic fields, leading to a third variable, magnetic flux, which characterises the field's strength.
电流产生了磁场，导致第三个变量的产生-磁通量，它表示磁场的强弱。
The machine's magnetic fields are powerful enough to induce electric currents in human brain cells without being harmful.
此种器械产生磁场的功率足以在人的大脑细胞里激发出电流而不会使人体有所损害。
Manufactured magnets are basically the same thing except that we use induced magnetic fields to line up the iron particles.
制造磁铁的情况基本相同，除了我们会利用磁场来排列铁粒子之外。
Researchers in Spain have developed an 'antimagnet' cloak that could hide objects from magnetic fields, reports ScienceNOW.
ScienceNOW报道称，西班牙的研究人员已开发出一种能够在磁场中隐藏物体的‘抗磁体’斗篷。
These magnets will generate local magnetic fields that point in opposite directions at different points on the chip's surface.
这些磁铁可产生局部磁场，从相反的方向作用于芯片表面不同位点。
These magnets will generate local magnetic fields that point in opposite directions at different points on the chip's surface.
这些磁铁可产生局部磁场，从相反的方向作用于芯片表面不同位点。
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