金融衍生品这种扩大问题的趋势使部分投资人要求管理者取缔一些衍生品种类.Derivatives'tendency to magnify problems has led to calls for regulators to ban some types.其作用是在书背上刷上少许胶, 并使部分胶液渗入书背拉槽内.It is in the back a little plastic, and some glue to infiltr...