Warning: file_put_contents(/www/wwwroot/ppbbbu/202081.com/cache/9672bbf9cd497c7a9b941fb2af9c4097.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/202081.com/index.php on line 55 ostracum例句_ostracum英汉例句_ostracum双解例句_2020年的事情英文词典
For the middle layer shell (ostracum), also known as the prism of the (primatic layer) accounted for most of shellfish from Jiaozhuang calcite (cacalcite) pose. 外层皮肤从背部折皱成一层皮膜，叫做外套。外套把身体包围起来，并分泌出石灰质。