books proper to this subject英语标准发音：books proper to this subject英式发音：美式发音：翻译中文适合这个主题的书books proper to this subject - 基本释义[词典1]专论本问题的书books proper to this subject - WEB词典books proper to this subject专论此问题的书 参考资料： 1.百度翻译：books proper to this subject2.有道词典：books proper to this subject3.爱词霸：books proper to this subject
