communication可数吗l

　　The rocket launched two communications satellites.

　　火箭发射了两颗通信卫星。

　　Our first task is to set up a communications system.

　　我们的首项任务是架设通信系统。

　　Written communications can often read as cold and dull.

　　书面交流通常会显得冷漠和无趣。

　　The Internet is the most significant progress in the field of communications.

　　互联网是通信领域最重要的进步。