template: ### Instruction: Rewrite this English sentence to give a better translation.
  
  ### English: Then, as the swarms of ants swarmed over the sand, the ants swarmed over the sand, and the ants swarmed over the sand, they swarmed over the sand, and they swarmed over the sand, and they swarmed over the sand, and they swarmed over the sand, and they swarmed over the sand, and they swarmed themselves, and they swarmed their offspring, and they swarmed their offspring.
  ### English rewrite: But they really need to spread their genes to mix with other genes so that they can adapt to environmental niches.