Dried laminaria, when inserted into the cervix, causes it to open and, over a period of hours, gradually stretchs the cervical canal.是什么意思_Dried laminaria, when inserted into the cervix, causes it to open and, over a period of hours, gradually stretchs the cervical canal.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句