Simplemente levantandolas por encima de la superficieda a las ballenas suficiente impulso descendente para alcanzar los grandes enjambres de krill y arenque debajo.
Simply raising them above the surfacegives the whales enough downward momentum to reach the great swarms of krill and herring below.
How many English words do you know?
Test your English vocabulary size, and measure how many words you know.