单词	durain
释义	durain noun du·​rain ˈd(y)u̇ˌrān plural -s : one of two dull constituents of banded bituminous coal forming lenses or layers and composed of finely comminuted woody debris only partly decomposed compare clarain, fusain, vitrain Word History Etymology Latin durus hard + -ain (as in fusain)
随便看	tuneups tung tung hai tung oil tung oil tree tung tree Tung-hu tungae Tungan tungans tungas tunghai tunghwa tungo tungs tungst- tungstate tungstates tungsten tungsten bronze tungsten carbide tungsten lamp tungsten trioxide tungstenite tungstens

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