dotted note

基本解释

A double dotted half note or minim is equal in length to three quarter notes or crotchets and an8th note or quaver.
半音加两个符点，时值等于三个四分音符或一个八分音符。
Please note that we used dotted lines between the layers to represent connections representing all possible inheritance relationships.
请注意，我们在各层之间使用了虚线，来表示所有可能的继承关系的连接。
Lines 67-119 draw the axes. Note that this time you are drawing four dotted guide lines across the graph and labeling them accordingly.
第 67-119 行绘制坐标轴，这里画了 4 条辅助虚线，并相应地做了标记。