if-then operation

基本解释

If one element is not in a container, then after the swap-operation the other element is not in a container.
如果其中一个元素不属于某个容器，则交换后另一个元素将不属于容器。
When this gesture is triggered, it takes the values that have been previously set, and if all non-optional ones are set, then it enacts the operation.
当触发这个操作时，它获取以前设置的值，如果所有非可选值都已经设置了，它就执行操作。
The effect of this is that if an event handler implements a request-response operation, then only one instance of such an event handler may be active at any point in time.
此规定的结果是，如果某个事件处理程序实现了一个请求-响应操作，则在任何时间点，只能有一个此类事件处理程序的实例处于活动状态。

However, they consistently approved the operation and one could argue that if a ten-year repayment was legal, then a forty-year repayment could also have been legal.
FORBES: Ireland's Promissory Note Deal