The principle of exercise compilation can bestated as follow: the principle of value union, the principle of system, princi-ple of convenient study and principle of inspiring. 5.是什么意思_The principle of exercise compilation can bestated as follow: the principle of value union, the principle of system, princi-ple of convenient study and principle of inspiring. 5.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句