margin transaction的用法和样例：
例句
- The growth in margin trading of fx has been a watershed idea that has taken hold within the past few years.
外汇保证金交易这几年的增长是这个概念的一个转捩点。 - Similarly, margin trading has yet to get the nod because of fears that investors will abuse the potential for leverage.
同样，保证金交易仍未获得中国政府首肯，原因是他们担心投资者将滥用杠杆潜力。
