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Gmail

科学上网：谷歌邮箱
谷歌邮箱是谷歌公司提供的免费的电子邮件服务，用户可以利用该服务发送和接收电子邮件，同时享有强大的搜索能力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、强大工具集成、文件整合与统一搜索于一体的平台。它将电子邮件、短信、Google Drives、Twitter、Trello、Asana、GitHub 等 65 种工具和服务整合到同一个平台中。

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