PURPOSE: To study the stress variation and distribution of the periodontium and the tooth initial displacement when the lingual fixate forces were applied to the depressed periodontal height.是什么意思_PURPOSE: To study the stress variation and distribution of the periodontium and the tooth initial displacement when the lingual fixate forces were applied to the depressed periodontal height.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句