American TV emcees have accumulated rich experiences for that.Some valuable academic viewpoints have been summarized on TV theory.But in China, TV News Emcees are somewhat newly-emerged things.

• 美国是电视节目主持人的诞生地，近半个世纪的实践中，美国电视主持人积累了较为丰富的经验，电视理论界也总结出了一些颇有价值的理论观点。