What's the meaning of 'if it does, in fact, go ahead.'? It is a report about referendum of eastern Ukraine, and it reads' Also unclear is what may happen after the referendum, if it does, in fact, go ahead.' What's the meaning of 'if it does, in fact, go ahead.'?

What's the meaning of 'spotty at best' ? What's the meaning of 'spotty at best' ? Give me an example.

What's the meaning of 'spotty at best' ? Our progress on our NPI process is still spotty at best, and long-term market conditions are unclear. What's the meaning of 'spotty at best' ?someone help me on that.

What's the meaning of ‘avoid windows ’ ？ As the diplomatic wrangling continued, residents of Slavyansk were warned Friday to stay home and avoid windows as the latest phase of the authorities' "anti-terrorist operation" got under way. What's the meaning of ‘avoid windows ’ ？

What's the meaning of 'waive off' ? But the threat seemed to do little to waive off Russia, with its Foreign Ministry saying Ukraine's use of its military in Slavyansk is criminal. What's the meaning of 'waive off' ?

What's the meaning of 'citing' here? GeoResonance Managing Director Pavel Kursa, citing intellectual property concerns, would not explain how the imaging works. What's the meaning of 'citing' here?

What's the meaning of 'your fist held at arm's length'? During its four-year mission, Kepler observed just a tiny, random, average piece of the sky, one you would cover with your fist held at arm's length. More than 1,000 planets have been discovered so far from just the nearby stars in that tiny patch of the sky. I don't know what's meaning of sentence 'one you would cover with your fist held at arm's length.'

What's the meaning of 'be engaged by'? Russian military intervention in Latvia, even under the guise of special forces in green garb without insignia, would almost certainly be engaged by Latvian military and police. If Russian security forces came to the assistance of their brethren in Latvia, as they would be likely to do, this would mean a direct confrontation between Russia and the U.S.-led NATO. What's the meaning of 'be engaged by'?