质量性状 (Qualitative character) ： 表现不连续变异（discontinuous variation）的性状，其 性状值能明确分组。 如：豌豆红花、白花；子叶颜色等性状。
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... 断续年轮 discontinuous ring 断续变异 discontinuous variation 分立随机变数 discrete random variable ...
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... discontinuous variable ==> 不连续变量,不连续变数,间断变量 discontinuous variation ==> 不连续变差,不连续变异 discontinuous variations ==> 不连续变异 ...
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The edge of image is manifested as discontinuity in image, what edge detection means is to doled (in the image ) those discontinuous points or sharp variation points.
图像的边缘表现为图像上的不连续性，边缘检测就是检测图像上的不连续点或陡变点。
Based on the variation principle, the composite element method (CEM) is studied for seepage analysis considering discontinuous surfaces and drainage holes.
基于变分原理，研究渗流分析中模拟排水孔和不连续面的复合单元法。
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