two-dimensional positioning system ==> 双向定位系统 two-dimensional pressure ==> 二维压力 two-dimensional rectangle function ==> 二维矩形函数 ..
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本研究应用彩色多普勒血流会聚新方法评价了对二尖瓣狭窄的定量诊断，并与二维超声、压力降半时间及综合法测量二尖瓣狭窄进行了比较。
The quantification of mitral stenosis by using a new color Doppler flow convergence method was evaluated, and compared with two -dimensional echocardiography, pressure half- time and combined method.
方法分别应用二维法（2D法）、多普勒压力减半时间法（PHT法）及实时三维容积法（RT3DE）检测18例行PBMV患者手术前后MVA。
Methods MVA was estimated in 18 patients before and after PBMV, using two-dimensional echocardiography(2DE), Doppler pressure half-time(PHT) and volumetric RT3DE.
采用平面和对数螺旋滑裂面的单滑块机制，对典型的二维土压力问题进行分析，其结果说明该方法的有效性。
For single block mechanism, such as plane and log-spiral slip surface, the validity of this method has been verified by a typical two-dimensional example.
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