Twitter is the place to find out about what's happening in the world right now. Whether you're interested in music, sports, politics, news, celebrities, or everyday moments.
推特是用来了解现在世界上发生的一些事情，如果你对音乐啦，运动啦，政治啦，新闻啦，名人啦和每日的动态感兴趣，来推特就对了。
Twitter was created in March 2006, and until 2016, there are 319 million active users.
推特在2006年，三月份创建，直到2016年，现在已经有3.19亿活性用户了。

Instagram is a great place to show off one's photography skills, what they did over the weekend, or maybe post a hundred different pictures of their cute pets.
Instagram是人们分享拍照技巧、周末生活和发布数百张可爱宠物的好地方。
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.
YouTube是可以上传自己的视频，看视频，或者给视频评论的地方。
WhatsApp is a free to download messenger app for smartphones. WhatsApp uses the internet to send messages, images, audio or video.
WhatsApp是一个免费的发短信的软件。用来发送文字信息，照片，音频和视频。