Warning: file_put_contents(/www/wwwroot/ppbbu/80125.cn/cache/e771868c724164897657bdc186005e71.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/80125.cn/index.php on line 58 polymer英英字典_polymer剑桥英语解释_polymer柯林斯英文解释_食材鋪反向词典
1. N-COUNT A polymer is a chemical compound with large molecules made of many smaller molecules of the same kind. Some polymers exist naturally and others are produced in laboratories and factories. 聚郃物