In the first public revelation of his nation’s losses, Ukrainian President Volodymyr Zelensky said Sunday that at least 31,000 troops have been killed fighting off the Russian invasion. Tens of thousands of civilians in occupied areas also have died, he said. Ukraine has been secretive about casualties in the two-year-old war, reports CNN, which points out that it can’t verify Zelensky’s figures. US officials have estimated the death toll at 70,000. The president told a forum in Kyiv that the real number is 31,000, “not 300,000, not 150,000, not whatever Putin and his deceitful circle have bee…