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陌陌（momo）是一款基于地理位置的移动社交工具，你可以通过陌陌认识周围任意范围内的陌生人，查看TA的个人信息和位置，并同TA聊天互动。通过陌陌，你可以非常及时的将网络关系转换为线下的真实关系。

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WeCom is a professional office management tool created by Tencent WeChat team for companies. Connected with WeChat messages, mini programs and WeChat Pay, it has a powerful messaging capability aligned with WeChat and comes with a wide variety of free OA apps to help companies achieve efficient working and management experience inside and outside organization. With comprehensive security, international authorized certification and bank-level encryption, it will ensure the data security of your company.

钉钉（dingtalk.com）是阿里集团专为中小企业打造的...