协作通过归类符号（一个被划分的长方形）来展示，而不是通过虚线椭圆形符号被展示。
The collaboration is shown using the classifier notation (a partitioned rectangle), rather than the dashed ellipse notation.
我们有四种形状，包括圆形、椭圆形、正方形和长方形。
We have four shapes that are round, oval, square and rectangle.
本周我们学习了形状：圆形、方形、长方形、三角形、菱形、心形和椭圆形。
This week we have been working on shapes: circles, squares, rectangles, triangles, diamonds, hearts, and ovals.
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