The Object Request Broker (ORB) pass by reference option determines if pass by reference or pass by value semantics should be used when handling parameter objects involved in an EJB request.
Object Request Broker (ORB) 通过引用传递选项确定，在处理 EJB 请求中涉及的参数对象时应该使用通过引用传递还是通过值传递语义。
If the EJB client and EJB modules are mapped to different application server instances (often referred to as split-tier), then the EJB modules must be invoked remotely using pass by value semantics.
如果EJB客户机和EJB模块被映射到不同的应用服务器实例(通常表示为split - tier)，则必须使用通过值传递的语义来远程调用EJB模块。
Listing 3. Value and reference semantics for getters and setters.
清单3 . getters和setters的值语义以及引用语义。
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