Both Comet streaming and hybrid polling applications permit two-way communication once the initial connection is setup.
comet流和混合轮询应用程序在初始连接建立后都允许双向通信。
2
For example, at the Musa Qala High School in Helmand province, only four out of nine polling-stations (probably setup in individual classrooms) fell foul of the ECC's criteria.