视频聊天：video chat with friends and families
see their facial expression and body language
让交流更加有效：make our communication more effective
I can use a webcam and video chat with friends and families, not only can I see their facial expression and body language, but also I can hear their voice, so it makes our communication more effective.
People often feel home sick when they are away from home. What do you often do to deal with home sickness?