控件生命周期中的关键操作被包装在一对事件中，一个在操作发生前触发，另一个在操作完成后立即触发。
Key operations in the control lifecycle are wrapped by a pair of events, one firing before the operation takes place and one firing immediately after the operation has completed.
通过使用GBean控件包装现有的J2EE资源，能满足J2EE标准的生命周期需求。
By wrapping your existing J2EE resources with GBean controls, you can bridge the life cycle requirements of the J2EE standard.
注1 材料和服务包括活动， 产品或服务，例如运输， 包装和最终使用/处理的【价值链/生命周期】。
NOTE 1 Goods and services includes the [value chain/lifecycle] of the activity, product or service, which includes, for example, transport, packaging and end-use/disposal.
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