磁針的用法和樣例：
例句
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指南針用於確定地理方向的設備，通常包括一個或多個水平安裝或懸挂的磁針，可在樞軸上自由活動直到與地球磁場在一條線上
A device used to determine geographic direction, usually consisting of a magnetic needle or needles horizontally mounted or suspended and free to pivot until aligned with the magnetic field of Earth.
