Warning: file_put_contents(): Only 0 of 6545 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/oclz.com/index.php on line 55 ring formation是什么意思，ring formation的翻译，ring formation音标、读音、用法和例句_菜篮子兴趣思朗文词典
Researchers have found the ringed homocentric structures in the section of urinary stone, but the formation mechanism remains unclear. 人们从尿结石的剖面图上发现其具有环状同心层结构，但其形成原因尚不清楚。