Perpetrators and victims are known to exchange roles over and over again in countless subtle and obvious ways.

以无数微妙或明显的方式，犯罪者和受害者会一再转换角色，这尽人皆知。

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The matrix identifies a distinct IER for each pair of objects or roles that interact and exchange information.

矩阵为每组交互并交换信息的对象或角色确定截然不同的 IER。

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These roles are analogous to and must interoperate with the server and client device roles the generic object exchange profile defines.

这些角色相似于而且必须与通用对象交换配置文件定义的服务与客户端角色互操作。

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On Wednesday, U.S. regulators voted in favor of a plan to beef of governance at the exchange, which included splitting the chairman and CEO roles.

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Previously he served in senior executive roles at Citibank and the US Securities and Exchange Commission.

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The Securities and Exchange Commission and the Commodity Futures Trading Commission will hold a two-day conference to sort out their respective roles in the Obama administration's plan to revise how to police America's markets.

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