Twitter 是即时通讯的一个变种，它允许用户将自己的最新动态和想法以短信息的形式发送给手机和个性化网站群，而不仅仅是发送给个人。2006年3月，博客技术先驱blogger.com创始人埃文·威廉姆斯(Evan Williams)创建的新兴公司Obvious推出了Twitter服务。在最初阶段，这项服务只是用于向好友的手机发送文本信息。2006年底，Obvious对服务进行了升级，用户无需输入自己的 手机 图片 [1]手机是最目前很流行的的通讯方式，随着智能机的发展，目前市场中智能机初步替代功能机， 目前手机系统主要为安卓和IOS两大阵营，当然我们也期待WP8系统也能逐步加入阵营， 手机最早是美国科技巨头摩托罗拉公司发明的。移动电话，通常称为手机，早期又有大哥大的俗称，是可以在较广范围内使用的便携式电话终端更多>> 号码，而可以通过即时信息服务和个性化Twitter网站接收和发送信息。
做空 The selling of a security that the seller does not own, or any sale that is completed by the delivery of a security borrowed by the seller. Short sellers assume that they will be able to buy the stock at a lower amount than the price at which they sold short. Short Selling Selling short is the opposite of going long. That is, short sellers make money if the stock goes down in price. This is an advanced trading strategy with many unique risks and pitfalls. Novice investors are advised to avoid short sales.
Hold 持有 研究分析员建议持有一种证券，不买也不卖 An analyst's recommendation to neither buy nor sell a security. A company with a hold recommendation generally is expected to perform with the market or at the same pace as comparable companies. Also known as "neutral" or "market perform". Taobiz explains Hold Exact definitions vary by brokerage, but this rating is better than sell, but worse than buy. It means that if you own a security you still shouldn't sell, but you also should not buy the security if you don't own it already (or do not buy more of it if you do).
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