单词	flashboard
释义	flashboard noun flash·​board ˈflash-ˌbȯrd  : one or more boards projecting above the top of a dam to increase the depth of the water Example Sentences Recent Examples on the Web During that week, engineers would also increase the height of the flashboard structure to 8 feet from 4 feet, replacing the plywood with metal. John D'anna, azcentral, 18 July 2019 On July 15, the lake level peaked, just inches from the top of the new 8-foot metal flashboards, and less than 7 feet from the top of the dam. John D'anna, azcentral, 18 July 2019 Word History First Known Use circa 1774, in the meaning defined above
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