The aortic valve shows three thin and delicate cusps.

主动脉瓣由三个薄而精细的瓣叶组成.

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Note there are three cusps sewn into a synthetic ring.

可见三个瓣叶围绕形成环.

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Nodules of calcification are seen on the cusps here.

可见瓣膜尖端有钙化结节.

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But its all existed B _ spline methods cannot reconstruct complicated surfaces with cusps and arrises.

样条方法具有良好的局部可控性和易解决参数连续性等优良性质,但已有的B样条方法还不能重建有尖点和棱角的曲面.

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