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。

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The spraying technique not only has the advantages of simple equipment, convenient operation and low cost, but also can be suited for irregular base surface with complex geometry shapes.

喷涂技术不仅具有设备简单、操作方便、费用低等优点，还具有能够适应不同基体表面形状的特殊优点。

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Acid corrosion could be used for tolerance adjustment of irregular core and core rod, replacing difficult operation of tolerance adjustment by machining.

三酸腐蚀可以对异形型芯、芯棒的尺寸公差进行调整，以代替机械加工对公差调整的困难操作。

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The prop was out of rugby for more than two months after undergoing an operation to correct an irregular heartbeat in October.

BBC: Paddy Wallace named in Ireland A squad for Saxons game