复旦大学经济学院教授孙立坚告诉南方周末记者，远期售汇是市场参与者为了规避未来现货市场汇率风险，向金融机构购买的一种金融服务，即锁定未来汇率水平。
Nature staff discuss some of the week’s top science news.，详情可参考一键获取谷歌浏览器下载
Go to technology，更多细节参见91视频
「像鬼一樣工作」：台灣外籍移工為何陷入「強迫勞動」處境，这一点在safew官方版本下载中也有详细论述
Today’s puzzle is a new twist on a classic genre: the “common knowledge” hat riddle in which logicians deduce facts about their hats based on what they know, and what they know others know.