In every case where work is done two things enter: 1) the exertion of a force and 2) the movement of something by that force.是什么意思_In every case where work is done two things enter: 1) the exertion of a force and 2) the movement of something by that force.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句