明天（6月30日）是社交媒体日。社交媒体日是2010年由Mashable网发起的，经常会有该网站粉丝参加现场聚会。近些年来，社会媒体重新界定了人们如何与家人、朋友以及世界的互动、交流和分享。社交媒体如何改变了你的生活？ 你知道美国驻华使团有多少社交媒体账号吗？

Tomorrow(June 30) is Social Media Day. Social Media Day was launched by the popular website Mashable back in 2010, and often sees fans of the site going to real life meetups. In its first few years of existence, social media has redefined how people interact, communicate and share with family, friends and the world. How has social media changed your life? Do you know how many social media accounts the U.S. Mission China has?