extraction operation短语¹⁴⁴⁹⁷²⁺² 基本例句 拍取手续 Result Hemorrhage after tooth extraction operation is always happened on local tissue injury, irregular operation and illogical adaption choice are the major cause of hemorrhage. 结果拔牙后出血以局部组织损伤为主，操作不规范和适应证选择不合理是造成出血的主要原因。 chemyq