The three towering figures of American history George Washington, Thomas Jefferson and Abraham Lincoln will shortly be joined by a fourth, with ground broken for a national memorial[] to civil rights leader Martin Luther King.是什么意思_The three towering figures of American history George Washington, Thomas Jefferson and Abraham Lincoln will shortly be joined by a fourth, with ground broken for a national memorial[] to civil rights leader Martin Luther King.在线翻译_英语_读音_用法_例句