^а уваривать(ся), выпаривать(ся), сгущать(ся) Use plenty of vegetables because the cooking boils them all down to a small quantity. Put a lot of the vegetable in the pan, it all boils down (to a small quantity).    ^б сокращать(ся), сжимать(ся) You can boil the long story down to a few sentences and it still has the same meaning.    ^в сводиться к чему-л The whole matter boils down to a power struggle between the trade union and the directors.