主要原因是因为在SIMM级别4，您只关心通过标准化协议和传输公开请求。
This is mostly because at SIMM level 4, you are focused only on exposing requests over standardized protocols and transports.
期货合约是受法律约束的，在质量、数量、交割时间及每一具体商品的交割地点上都有标准化协议。
Futures contracts are legally binding agreements and are standardized according to the quality, quantity, delivery time, and location for each commodity.
协议适配器是一种软件组件，它通过标准化协议(如HTTP和SNMP)提供对代理管理的资源的访问。
A protocol adapter is a software component that provides access to the agent-managed resources through a standardized protocol, such as HTTP and SNMP.
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