????:1?600?????????:?????

2???400???

3??????

4???????

5?????

???????????,????????????,????????????7????????????????4?,??,??????????????(??????????????????????????)???????????

??,???,???????????????

??,????????????,??,????????

???????CNN???????????,????????????,??????????????,??????????

?????????4??????????????,????????????????????????,???,???????????????,????????????????

(???? ??????????????)

??????:????????