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1. This magnetic variometer can measure the magnetic field strength.
这个磁性变差计可以测量磁场强度。
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2. The magnetic variometer was used to detect the presence of a magnetic field.
磁性变差计用于检测磁场的存在。
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3. The magnetic variometer is an essential tool for measuring the Earth's magnetic field.
磁性变差计是测量地球磁场的重要工具。