В заявлении МИД Израиля
(http://www.israel-mfa.gov.il/MFA/About+the+Ministry/MFA+Spokesman/2006/Israel+welcomes+IAEA+decision+on+Iran+5-Feb-2006.htm)
говориться
Israel hopes that the international community will act decisively and expeditiously, conveying a clear message to Teheran that it must put a complete and immediate end to its nuclear activities.

Стало быть, act expeditiously - действовать оперативно