作者:阿弎
链接:http://www.zhihu.com/question/19851109/answer/91201815
来源:知乎
著作权归作者所有,转载请联系作者获得授权。
==============================第一阶段=================================
![](https://pic2.zhimg.com/eadd4a5bbafc85099b88882639e459b1_b.jpg)
![](https://pic3.zhimg.com/03b6e35381c9e706b0c593f30be0beaa_b.jpg)
==============================第二阶段=================================
![](https://pic2.zhimg.com/cc7d077cc768e19abd66533629fe6a81_b.jpg)
==============================第三阶段=================================
![](https://pic1.zhimg.com/3e361cf37f6f9cd9a36eb19a3928ccc8_b.jpg)
==============================第四阶段=================================
![](https://pic3.zhimg.com/e1cd5b0f5f29d241ad3b17504751a662_b.jpg)
![](https://pic2.zhimg.com/e4e84695b20e90cc25bdcfa90843cc51_b.jpg)
==============================第五阶段=================================
![](https://pic1.zhimg.com/c029a5003891ce71d36b1fa18e641d48_b.jpg)
==============================第六阶段=================================<img![](https://pic4.zhimg.com/9434eea395c26af6178e637525c5cbf7_b.jpg)
![](https://pic2.zhimg.com/5736362236f6a5ead4f56158856d2d3d_b.jpg)
==============================第七阶段=================================
![](https://pic1.zhimg.com/61bb74ce441f31f1678fc59fd28da7e0_b.jpg)
链接:http://www.zhihu.com/question/19851109/answer/91201815
来源:知乎
著作权归作者所有,转载请联系作者获得授权。
==============================第一阶段=================================
![](https://pic2.zhimg.com/eadd4a5bbafc85099b88882639e459b1_b.jpg)
![](https://pic3.zhimg.com/03b6e35381c9e706b0c593f30be0beaa_b.jpg)
==============================第二阶段=================================
![](https://pic2.zhimg.com/cc7d077cc768e19abd66533629fe6a81_b.jpg)
==============================第三阶段=================================
![](https://pic1.zhimg.com/3e361cf37f6f9cd9a36eb19a3928ccc8_b.jpg)
==============================第四阶段=================================
![](https://pic3.zhimg.com/e1cd5b0f5f29d241ad3b17504751a662_b.jpg)
![](https://pic2.zhimg.com/e4e84695b20e90cc25bdcfa90843cc51_b.jpg)
==============================第五阶段=================================
![](https://pic1.zhimg.com/c029a5003891ce71d36b1fa18e641d48_b.jpg)
==============================第六阶段=================================<img
![](https://pic4.zhimg.com/9434eea395c26af6178e637525c5cbf7_b.jpg)
![](https://pic2.zhimg.com/5736362236f6a5ead4f56158856d2d3d_b.jpg)
==============================第七阶段=================================
![](https://pic1.zhimg.com/61bb74ce441f31f1678fc59fd28da7e0_b.jpg)