名词
中文翻译：双头目
同义词：
['doublehead', 'double-eyed', 'double-faced例句：1. The dipoles are the main components of the magnet.（双极体是磁铁的主要组成部分。）']
例句：
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1. The dipoles are the main components of the magnet.
双极体是磁铁的主要组成部分。
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2. The dipoles are responsible for the movement of the earth's magnetic field.
双极体负责地球磁场的移动。
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3. The dipoles are used in many applications, such as radar and communication systems.
双极体在许多应用中都有使用，如雷达和通信系统。