“噗，这只是______”跑步机： s̶t̶a̶t̶i̶s̶t̶i̶c̶s̶ l̶i̶n̶e̶a̶r̶ ̶a̶l̶g̶e̶b̶r̶a̶ m̶a̶t̶r̶i̶x̶ ̶m̶a̶t̶h̶ m̶a̶t̶h̶ f̶e̶e̶d̶-̶f̶o̶r̶w̶a̶r̶d̶ ̶c̶i̶r̶c̶u̶i̶t̶s̶ c̶o̶m̶p̶u̶t̶a̶t̶i̶o̶n̶ machinery