Warning: file_put_contents(): Only 0 of 7272 bytes written, possibly out of free disk space in /home/www/wwwroot/ndsq.cn/index.php on line 55 ring formation例句_ring formation英汉例句_ring formation双解例句_开心英文字典_柠咚词
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。