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magnetic retentivity | 顽磁性
，保磁性 | The ability to retain MAGNETISM after removal of the magnetizing force. Also called remanence. | 去除磁化力后保持磁性的能力。亦称remanence（剩磁）。 |
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magnetic secular change | 长期磁变
| The temporal variation in the value of a MAGNETIC ELEMENT which occurs over a period of years. | 以多年为周期地磁要素值出现的时变。 |
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magnetic station | 地磁观测站
| See STATION. | 进行任何一组磁力观测的地理位置。 |
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magnetic storm | 磁暴
| A disturbance in the EARTH'S MAGNETIC FIELD, associated with abnormal solar activity, and capable of seriously affecting both radio and wi... more | 与异常太阳活动有关的地磁扰动，能够严重影响无线和有线传输。 |
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magnetic survey | 地磁测量
| See SURVEY. | 在地球表面或近地面进行的对指定点处地球磁场强度和方向的测量。 |
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magnetic temporal variation | 磁时变
| Any change in the EARTH'S MAGNETIC FIELD which is a function of time. Also referred to as temporal variation. | 地球磁场的任何变化，是时间的函数。亦称temporal variation（时间变化）。 |
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magnetic variation | 磁变，磁差
| See VARIATION. | 参见variation（磁差）。 |
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magnetism | 磁力，磁性
| The ability to attract magnetic material, notably iron and steel. | 吸引磁性材料的能力，特别是铁和钢。 |
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magnetism: induced | 感生磁性
| MAGNETISM acquired by a piece of magnetic material while it is in a MAGNETIC FIELD. | 一块磁性材料在磁场中获得的磁力。 |
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magnetism: permanent | 永磁性
| MAGNETISM which is retained for long periods without appreciable reduction, unless the MAGNET is subjected to a demagnetizing force. Because... more | 能够长时期保持磁性且无可感知的减弱的性质，除非受到退磁力影响。因该种磁性消散缓慢，有时称之为subpermanent magnetism（次恒磁）。 |
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magnetism: residual | 残磁，残磁性
| MAGNETISM which remains after removal of the magnetizing force. | 指撤除磁化力后仍剩余的磁性。 |
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magnetism: subpermanent | 半永久磁性；次恒磁 | See MAGNETISM: PERMANENT. | 指磁铁除非遭受消磁处理，否则它的磁性能保持很长时期而不会显著减弱，因为这种磁性的消散缓慢，有时称之为subpermanent magnetism（次恒磁）。 |
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magnetism: temporary | 瞬变电磁 | MAGNETISM of craft which changes in amount with every change of HEADING. Also called transient magnetism. | 指船的磁力随着船首方向的每次变化而改变其数值。亦称transient magnetism。 |
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magnetism: terrestrial | 地磁学 | See GEOMAGNETISM. | 地球的磁性。亦称terrestrial magnetism。 |
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magnetism: transient | 瞬变电磁 | See MAGNETISM: TEMPORARY. | 指船的磁力随着船艏方向的每次变化而改变其数值。亦称transient magnetism。 |
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magnetization | 磁化(强)度
| The degree to which a body is magnetized. The MAGNETIC MOMENT per unit volume. Also called intensity of magnetization. | 物体被磁化的程度。用单位体积的磁矩表示。亦称intensity of magnetization（磁化强度）。 |
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magnetize | 使磁化
| (v.t.). To produce magnetic properties. The opposite is DEMAGNETIZE. | （动词）。使物体产生磁性。反义词为退磁(demagnetize)。 |
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magnetogram | 地磁记录图
| An analogue time record of the temporal variations in a MAGNETIC ELEMENT measured at a MAGNETIC OBSERVATORY. | 在地磁台测量地磁要素时变的模拟时间记录图。 |
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magnetograph | 地磁（强度）记录仪
| A MAGNETIC OBSERVATORY instrument consisting of one or more (usually 3) VARIOMETERS, one for each MAGNETIC ELEMENT recorded, and a recorder... more | 由一个或多个（通常三个）用于记录某一地磁要素的磁变仪及一个记录器组成的地磁台设备。 |
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magnetometer | 磁力仪
| An instrument for measuring the intensity and/or the direction of the EARTH'S MAGNETIC FIELD. | 用于测量地球磁场强度和（或）方向的仪器。 |