Use session beans acting as remote facades to wrap complex interactions and to reduce remote calls between portlets and domain objects.

使用会话Bean作为远程外观使用，对复杂交互进行包装，并减少Portlet和域对象间的远程调用。

youdao

The complex machine is difficult for even the brainiest of scientists to wrap their heads around.

即使对最聪明的科学家来说，要弄清楚这台复杂的机器也是非常困难的。

youdao

To avoid this problem, you can define a complex type to wrap the value type and set the complex type to be null to indicate a null reference.

为了避免这个问题的出现，您可以定义复合类型来封装数值类型，并将这个复合类型置为空来表示空引用。

youdao