Warning: file_put_contents(/home/www/wwwroot/tjuzi.com/cache/0522b5b86f045e2d46a29df67aa344c5.txt): failed to open stream: No space left on device in /home/www/wwwroot/tjuzi.com/index.php on line 55 ecomomics例句_ecomomics英汉例句_ecomomics双解例句_橘子化妆朗文词典
This paper analyzes the protection of the optimal patent length from the angle of ecomomics with the help of the length benefit curve and the Nordhaus basic model. 摘要文章從經濟學角度出發，通過期限收益曲線模型和諾德豪斯的基本模型，對專利最優保護期限進行了分析；