名词
中文翻译：指南针磁铁
同义词：
['compass magnet', 'compass magnet', 'compass magnet']
例句：
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1. This compass magnet is very useful for navigation.
这个指南针磁铁对于导航非常有用。
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2.The compass magnet was the only thing that could be used to find our way.
指南针磁铁是我们唯一可以用来找到我们方向的东西。
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3.The compass magnet was so small that it could easily be lost in a crowd.
这个指南针磁铁太小了，很容易被人群丢失。