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紙錢包紙錢包:把私鑰列印在紙上存放,再刪除電腦上的錢包文件,實現錢包的網路隔離。Emerging SARS-CoV-2 variants have built COVID-19 convalescents liable to re-infection and have lifted problem concerning the efficacy of inactivated vaccination in neutralization from emerging variants and antigen-precise B mobile