| 单词 | mercurial pendulum | 
| 释义 | Definition of mercurial pendulum in English:mercurial pendulumnoun 
 OriginLate 18th century; earliest use found in Ephraim Chambers (?1680–1740), encyclopaedist. Definition of mercurial pendulum in US English:mercurial pendulumnoun 
 OriginLate 18th century; earliest use found in Ephraim Chambers (?1680–1740), encyclopaedist.  | 
	
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