RTSP is a streaming media presentation control protocol used to manage the delivery of real-time data. It doesn't transfer streaming data by itself.

实时流协议rtsp是一个流媒体表示控制协议，用于控制具有实时特性的数据发送，但RTSP本身并不传输数据。

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Apple Stores were conceived as a way for Apple to promote its entire smorgasbord of products and to control their presentation.

CNN: Mark Milian,

Most of these restaurants have made another big change in how dim sum is eaten: They've done away with serving trolleys, mainly to give chefs more control over cooking and presentation.

WSJ: The Best Dim Sum in Hong Kong | In Search Of

No matter how much you prepare for your presentation, there are external factors beyond your control.

FORBES: It's Crunch Time! How to Squeeze a One-Hour Presentation into 20 Minutes.