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Gmail

翻墙上网：谷歌邮箱
谷歌邮箱是谷歌公司提供的免费电邮服务，用户可以利用该服务进行电子邮件的发送与接收，同时享有强大的搜索功能和大容量的存储空间。

Slack

科学上网名称：Slack
Slack 是一个集聊天群组、大规模工具整合、文件整合和统一搜索于一体的应用。它将电子邮件、短信、Google Drives、Twitter、Trello、Asana、GitHub 等 65 种不同的工具和服务整合到一个统一的平台上。

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