a duplicate is created so the original copy of the data remains untouched.
sys.stdout.write(u"\u001b[0K") # Clear the line
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At least $2bn (£1.5bn) has been spent by 11 African governments on Chinese-built surveillance technology that recognises faces and monitors movements, according to a new report by the Institute of Development Studies, which warns that national security is being used to justify implementing these systems with little regulation.。业内人士推荐博客作为进阶阅读