drop in the bucket

The sentense" drop in the bucket" means a little thing can not be enough. In China, we say that when a dozen of woods are firing, we just use a small cup of water to cut down the engine. Everyone knows the cup of water is not enough for the bigger fire, we can't save the wood. I think the words can describle the ecnomic in the world now. Althought the whole goverments in the world are trying to change the bad situation, it is just" drop in the bucket".