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VOA慢速英语:Video Calling Services Compared
2016-08-25来源:VOA
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download - v. to move or copy (a file, program, etc.) from a usually larger computer system to another computer or device
platform - n. a program or set of programs that controls the way a computer works and runs other programs
browser - n. a computer program that is used to find and look at information on the Internet
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