A city of central Maryland, a residential suburb of Washington, D.C. It was planned and built by the federal government as an experimental model community. Population,21, 096.是什么意思_A city of central Maryland, a residential suburb of Washington, D.C. It was planned and built by the federal government as an experimental model community. Population,21, 096.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句