At the retail secondary market level, again the Banks are mainly the service providers in an unregulated environment, although some of the debt instruments are listed on the stock exchange.

至于零售二手市场，银行同样是主要的服务供应者，尽管有些债券是在证券交易所挂牌买卖，但市场运作大致上是没有甚么管制的。

youdao

It requires secondary transformation to transform the voltage into usable signal for electronic measuring instruments.

需进行二次变压，才能将电网上的信号变为电子测量装置可用的信号。

youdao

The non-reschedulable character of bonds -- thanks, in part, to the large secondary market for such instruments.

CENTERFORSECURITYPOLICY: Center For Security Policy

Flintshire council said it provided a service which offered music tuition on a wide range of instruments to learners in primary and secondary schools.

BBC: Cuts threaten Wales' musical reputation - Karl Jenkins