Warning: file_put_contents(): Only 0 of 4958 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/4cd.cn/index.php on line 55 single-span greenhouse例句_single-span greenhouse英汉例句_single-span greenhouse双解例句_沉淀汉英词典
Through economy analysis on the single-span plastic greenhouse of components, the way to reduce cost-alternative mate rial has presented. 通过对某单栋塑料大棚各组成部件的经济分析，提出降低成本的可能方法——材料的科学替换。