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实现代码：

import turtle

turtle.pencolor(‘green’)
turtle.fillcolor(‘green’)
turtle.begin_fill()

turtle.circle(100,90)
turtle.left(90)
turtle.circle(100,90)

turtle.right(180)
turtle.circle(100, 90)
turtle.left(90)
turtle.circle(100,90)

turtle.right(180)
turtle.circle(100, 90)
turtle.left(90)
turtle.circle(100, 90)

turtle.right(180)
turtle.circle(100, 90)
turtle.left(90)
turtle.circle(100, 90)

turtle.end_fill()
turtle.hideturtle()
turtle.done()

实现效果：