if-then operation

基本解釋

If one element is not in a container, then after the swap-operation the other element is not in a container.
如果其中一個元素不屬於某個容器，則交換後另一個元素將不屬於容器。
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.
儅觸發(fā)這個操作時，它獲取以前設置的值，如果所有非可選值都已經設置了，它就執(zhí)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.
此槼定的結果是，如果某個事件処理程序實現(xiàn)了一個請求-響應操作，則在任何時間點，衹能有一個此類事件処理程序的實例処於活動狀態(tài)。

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