Go out to fly the kites and enjoy the difform kites.

请幼儿外出放飞风筝，欣赏不同形状的风筝。

According to the practical instance of the apparatus modules of artificial satellite, the layout optimization models of the difform graph elements are discussed.

依照卫星仪器舱布局问题的实际应用状况，讨论多种图元的布局优化模型。