Warning: file_put_contents(): Only 0 of 7344 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/oclz.com/index.php on line 55 polymer英英字典_polymer剑桥英语解释_polymer柯林斯英文解释_菜篮子兴趣思朗文词典
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