“magnetic needle”的概念、定义、翻译、参考文献-科学参考

单词	magnetic needle
释义	magnetic needle [mag`ned·ik `nēd·ǝl] ^{ELECTROMAGNETISM} 1. A bar magnet or collection of bar magnets which is hung so as to show the direction of the magnetic field. 2. In particular, a slender bar magnet, pointed at both ends, that is pivoted or freely suspended in a magnetic compass.
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