圆形或三角形的耳环也会增加脸部的圆润度。
You can also choose circular or triangular earrings; they will add roundness to your face.
在健康的脊柱，椎管是圆形或三角形的，为脊髓提供了畅通无阻的通道。
In a healthy spine, the spinal canal has a rounded, triangular shape that provides an obstruction-free channel for the spinal cord.
为了在一个类图上建模继承，从子类(要继承行为的类)拉出一条闭合的，单键头(或三角形)的实线指向超类。
To model inheritance on a class diagram, a solid line is drawn from the child class (the class inheriting the behavior) with a closed, unfilled arrowhead (or triangle) pointing to the super class.
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