Warning: file_put_contents(/www/wwwroot/ppbbbu/5356789.com/cache/c553224e637bf913da8806896ddf7ce2.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/5356789.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_零六五六深蓝词典
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