...文的奇异QSIC只可能包含一个二重奇异点（double singular point），奇异点可以是孤点（acnode），叉点（crunode）或尖点（Cusp）。对一条包含孤点的奇异QSIC，只有孤点为实点（其它部分为虚的）是可能的。
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beach cusp [海洋] 滩角 ; 海岸尖头 ; 海滩嘴滩角 ; [海洋] 海滩嘴
cusp of the moon 月牙的尖角
cusp tip 牙尖端
double cusp [数] 双尖点
parabolic cusp [数] 抛物尖点
central cusp 畸形中央尖 ; [口腔] 中央尖
dental cusp [解剖] 牙尖
focal cusp 焦会线
People’s wearing psychology state was studied in a systematic way according to the cusp catastrophe model, and the wearing psychology was classified into three categories, imitation, exploration and comprehension, respectively.
同时,本文根据尖点突变模型对服装色彩穿着过程的心理状态进行了系统分析,判断出与之相应的穿着心理——模仿型、开拓型和综合型。
参考来源 - 基于穿着因素的服装色彩咨询系统研究·2,447,543篇论文数据，部分数据来源于NoteExpress
PHRASE If you say that someone or something is on the cusp, you mean they are between two states, or are about to be in a particular state. 介于两个状态之间; 将要进入特定状态
I am sitting on the cusp of middle age.
我正处于中年。
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