七上规律题简介：Need not. Xiaolan was sitting on the window sill, with her right leg bent and stepping on the outside of the window sill, while the other leg was drooping outward, making people worried that she might accidentally fall.
Need not. Xiaolan was sitting on the window sill, with her right leg bent and stepping on the outside of the window sill, while the other leg was drooping outward, making people worried that she might accidentally fall.
