单词	triact
释义	triact noun tri·​act ˈtrīˌakt plural -s : a triactinal sponge spicule Word History Etymology tri- + -act
随便看	downthrown downthrows downthrust downtick downticks downtime downtimes Downtonian downtown downtowner downtowners downtownest downtowns downtrend downtrends downtrod downtrodden downturn downturns downward downward spiral downwarder downwardest downwardlier downwardliest

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