单词	Kelvin balance
释义	Kelvin balance noun : a device for comparing the force produced by an electric current flowing through fixed and movable coils and the force of gravity Word History Etymology after Lord Kelvin
随便看	gray widgeon gray wildcat gray willow gray wolf gray-brown podzolic soil gray-cheeked thrush gray-crowned babbler gray-faced gray-headed woodpecker gray-leaf pine grayback grayback beetle graybacks graybeard graybeard tree graybeards graycoat grayed grayed out grayed-out grayer grayest grayfish grayfishes grayhead

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