TOPIC: PCs are useful
R1: simple to use, use everywhere
EX1: you can do a research in the heart of the night
R2: you can perform a very complete analysis
EX: you get an outcome with an average of 2s
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Speaking reference notes: This topic is refereed from another speaking topic, developed by user: xiaoyangyangyangyang
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Don't repeat words, phrases and sentences. like: I think...