The coils in the scanning apparatus detect these magnetic changes, which are used to build up a map of the part of the body being examined.
扫描仪上的线圈探测到这些磁场变化，并以此构建出患者受检部位的图谱。
The magnetic changes of the samples prepared from ferrous Wiley Mill have been studied with the economic and fast method of Gouy balance.
用经济、快速的古埃天平法，研究了铁质粉碎机制备试样的磁性变化。
At the Earth's surface, these tempests can be detected by changes in the strength of the Earth's magnetic field.
在地球表面，可以通过改变地球磁场强度来检测这些风暴。
These changes are mild compared to what Earth's magnetic field has done in the past - sometimes the field completely flips, with the north and the south poles swapping places.
这种变化与地球磁场曾经发生过的变化相比还算温和的——有时地球磁场会完全翻转，地磁北极和地磁南极会对调。
These changes are mild compared to what Earth's magnetic field has done in the past —sometimes the field completely flips, with the north and the south poles swapping places.
这种变化与地球磁场曾经发生过的变化相比还算温和的——有时地球磁场会完全翻转，地磁北极和地磁南极会对调。
He told us that magnetic north is moving at a speed of 50 kilometers - about 30 miles - every year. He said that scientists nowadays use satellites to track the changes.
他告诉记者，磁北极每年以50千米(约30英里)的速度移动，如今科学家使用人造卫星追踪磁极移动的轨迹。
Changes in the thickness, viscosity and conductivity of the outer core in the past could have led to convection patterns that caused the magnetic pole to tilt.
过去任何来自于核外层的厚度、粘性和导电性变化都会导致对流形式变化从而引起磁极倾斜。
Since a magnetic field changes the resistance of ordinary metals by only a fraction of a percent, they dubbed this phenomenon "giant magnetoresistance," or GMR.
由于磁场变化对普通金属只会造成远远不到百份之一的电阻变化，这种现象被称为“巨磁电阻”或巨磁阻gmr。
Since a magnetic field changes the resistance of ordinary metals by only a fraction of a percent, they dubbed this phenomenon "giant magnetoresistance, " or GMR.
由于磁场变化对普通金属只会造成远远不到百份之一的电阻变化，这种现象被称为“巨磁电阻”或巨磁阻GMR。
The structure of these particles changes in a magnetic field in a way that produces “interference” colours when light is shone on them.
一定程度上，在磁场中这些粒子的结构发生改变，有光照射时它们会产生“串扰”颜色。
Scientists already knew that the creatures used changes in Earth’s magnetic field to help them tell north from south and steer themselves along the right latitude.
海龟利用地球磁场的变化分辨南北方位，从而指引自己沿正确的纬度迁徙，这对科学家来说并不陌生。
Scientists already knew that the creatures used changes in Earth's magnetic field to help them tell north from south and steer themselves along the right latitude.
海龟利用地球磁场的变化分辨南北方位，从而指引自己沿正确的纬度迁徙，这对科学家来说并不陌生。
These instruments measure tilts int the ground's surface, as well as changes in the magnetic field near active faults . Usually these changes precede the occurrence of some earthquakes.
他们还用各种各样的仪器和方法，通过测量地震前发生的地球物理上的变化，如地表倾斜度和活性断层附近的磁场变化，对地震进行预测。
Thomson found that the electrical resistance of some materials changes when a magnetic field is applied to them. This effect can be used to read back what has been recorded.
他发现有些材料在受到磁场作用时会改变其电阻性，这种效应也可被应用于回读被记录的数据。
But let's not bother.Again, what this equation tells you is that if the magnetic field changes over time then it creates, just out of nowhere, and electric field.
我们就不纠结这种情况了，这个方程告诉你，如果磁场随时间变化，它就会无中生有地产生电场。
Objective: To observe changes of heart functions in the minesweeper crew after the synchronous magnetic minesweeping operations.
目的：观察扫雷艇同步扫雷通磁作业前后艇员心功能的变化。
All were asked to perform Web searches and book-reading tasks while undergoing functional magnetic resonance imaging (fMRI) scans, which recorded the brain-circuitry changes they were experiencing.
通过磁性共振成像(fMRI)扫描检查并记录所有人员在网络搜索浏览和书籍阅读时的脑电波变化。
The magnetic entropy changes were the benchmark for the application of the magnetocaloric materials.
磁熵变化值是衡量磁制冷材料好坏的一项重要指标。
When the sun's rotation sweeps this warped surface across the earth, we detect sudden changes in the polarity of the magnetic field.
当太阳的自转使这个波浪形间隔面扫过地球时，我们就会探测到磁场极性的突然反转。
Dr Tyler and Dr Sabaka, who work at the Goddard Space Flight Centre, in Maryland, observe that satellites can detect small changes in Earth's magnetic field induced by the movement of water.
泰勒博士和沙巴卡博士任职于马里兰州的戈达德太空遨游飞翔中心，他们负责观测那些可以或许检测海水流动引起的地球磁场的微小变化的卫星。
Currently, magnetic resonance imaging (MRI) is used 1-3 months after treatment to evaluate anatomical tumor response, based upon changes in tumor size and contrast-agent enhancement.
目前，人们基于肿瘤大小和对比剂增强变化之原理，在治疗后1 - 3个月时，用磁共振成像(MRI)来评估解剖学上的肿瘤反应。
The magnetic properties of magnetic material are mainly determined by its domain structure and the way it changes, so the observation of magnetic domain is always a very important subject.
磁性材料的宏观磁性能主要是由磁畴结构及其运动变化方式所决定，因此磁畴图像的观测是一个很重要的研究课题。
The location changes of magnetic anomalycentre of African and Southern Atlantic anomaly are the fastest in the all of themagnetic anomalies.
南大西洋正磁异常和非洲负磁异常是磁异常中心位置变化最快的两个磁异常。
The experimental results show that the quantitative changes of nonmagnetic ion substitution cause the regular changes of magnetic properties.
实验结果表明：非磁性离子代换量的变化引起材料磁特性的规律性变化。
This means that the magnetic North Pole changes place with the magnetic South Pole.
这意味着磁北极的变化与南极磁场发生。
Weak magnetic signal changes and metal magnetic memory effects of steel tensile samples under the excitation of geomagnetic field were studied.
研究地磁场环境中钢试件在动拉伸载荷作用下表面弱磁信号的变化以及磁记忆效应。
Weak magnetic signal changes and metal magnetic memory effects of steel tensile samples under the excitation of geomagnetic field were studied.
研究地磁场环境中钢试件在动拉伸载荷作用下表面弱磁信号的变化以及磁记忆效应。
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