Finish comments on bwmf
Finish comments on bwmf

dzch/taskgraph,5kg/taskgraph,fengjingchao/taskgraph,kod3r/taskgraph,BaiGang/taskgraph,plutoshe/taskgraph,dzch/taskgraph,plutoshe/taskgraph,kod3r/taskgraph,plutoshe/mapreduceOfTaskgraph,plutoshe/mapreduceOfTaskgraph,5kg/taskgraph,taskgraph/taskgraph,taskgraph/taskgraph,fengjingchao/taskgraph,BaiGang/taskgraph