However, the detailed transient flow field, the originating mechanism and the potential application of unsteady tip clearance flow are unclear or not enough understood to date.
然而到目前为止，这种非定常波动的基本流动特征，形成机理及其潜在的应用前景都不够清楚。
Method:The clinical date of 18 patients with transient ischemic attack(TIA) and carotid artery stenosis who underwent CEA were reviewed.
方法：回顾性总结18例因短暂性脑缺血（TIA）伴颈动脉狭窄患者而行颈动脉内膜切除术的临床资料。
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