In most cases,the plaque located at the bifurcation of the carotid artery. 頸動脈粥樣斑塊好發於分叉處，在各型斑塊中軟斑與潰瘍斑是腦梗塞的主要栓子來源之一。
The primary resonance bifurcation problems are discussed for an arch structure with parametric and forced excitation. 摘要研究拱型結構在參數激勵與強迫激勵聯合作用下的主共振情形的分叉問題。
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