1.But in general, I have to draw picture of my region, and see how the slices look like both ways.
但通常都要画出积分域的图像，观察两种不同积分次序中切面的形状。
2.secondly, to draw picture of the manifold with these points by mean of triangle partition.
再借助三角形剖分方法利用PDE算法算出的画出直观流形图。
3.If you need to design or draw cartoons, draw picture, please ask me!
如果你需要设计或者画卡通、画漫画，就找我吧！
4.I will learn to draw picture really hard.
我将努力学习画画。