Практикум по синхронному переводу с русского языка на английский

A beneficial/favorable/positive impact/influence on improving the European climate/atmosphere has already been exerted/demonstrated by a thing/something which was born of/produced by a painful/arduous quest/search for compromise, namely/that is/the Founding Act on relations between Russia and NATO. This is a document of great international importance/significance/resonance, and it undoubtedly/ unquestionably/indisputably will play an essential/pivotal/substantive role in European politics. The signing of this document, of course/ naturally/however, has not changed our negative view of/attitude towards the expansion of NATO, which, on the one hand, totally ignores current realities/has nothing to do with the present state of affairs/is not based on today's realities and on the other is fraught with the risk/danger of/is likely to create new dividing lines.
It is my duty to/I am (duty) bound to/I cannot fail to/I find it imperative to mention/yet another contribution to strengthening good-neighborly relations in Europe. I am referring to/I have in mind/ the recently signed agreements between Russia, Ukraine and Belarus, which have enabled/allowed/made it possible for our states to make real progress/take major steps forward/in developing mutually beneficial/advantageous and equitable relations/relations on an equal footing, which have strengthened stability in the region.
I began my statement/intervention with an appeal to encourage/ call for the international community to (use its potential) resolve current/today's problems and to look forward to the coming century. And I would like to conclude with the well-known saying/maxim/ adage, "Pessimists are only passive observers/bystanders; the world is changed by optimists/it is optimists who change the world." We are optimists, and believe that the UN will be able to play a positive role in the development/evolution of the international community.
Комментарии:
1) дружественной Украины — "friendly Ukraine" is possible, and may be the only solution if the interpreter is rushing, but it does not sound good in English. "With which we have friendly relations" is much longer but also much more idiomatic.

2.