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.

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。

youdao

We want the client to be able to just place the order and continue with other work, so the operation is one-way.

我们只要求客户端能提供订单，然后执行其他工作，因此该操作是单向的。

youdao

Most instructions have one or more operands, specifying the source values to references in performing an operation and the destination location into which to place result.

大多数指令有一个或多个操作数，赋予具体源值以备执行操作以及目标存储单元显示结果参考。

youdao

Political leaders in South-East Asia are always careful not to upset their devout Muslim supporters, which is one reason why most co-operation with America in its war on terrorism takes place behind the scenes.

ECONOMIST: Terror in the shadows | The