Effect of endotoxin of prevotella intermedia and bacteroides fragilis on proliferation and ultrastructure of periodontal ligament cell in vitro是什么意思_Effect of endotoxin of prevotella intermedia and bacteroides fragilis on proliferation and ultrastructure of periodontal ligament cell in vitro在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句