Telepresence: Simulate being some other place retrospectively as an observer (Teleoberserver): hear and see as well as actually being there, and as well as a participant.

• 远程临场感：模拟另一个地方的场景使你感觉就好像是一个在现场的观察者那样听见和看见现场发生的一切（远程观察）；