Results: The fracture occurred vertically, and mostly on the 1/3 of the tip of roots and 1/3 of the middle of the roots in the metal post and titian post group.是什么意思_Results: The fracture occurred vertically, and mostly on the 1/3 of the tip of roots and 1/3 of the middle of the roots in the metal post and titian post group.在线翻译_英语_读音_用法_例句