The main group keeps up the chase... 大部队继续追赶
The males stay as close to the female as possible 雄鲸尽可能靠近雌鲸
humpback males exploit this ability to the full... 众多雄性座头鲸会充分利用这项能力
...allowing the whales to generate sustained bursts of energy. 所以能够产生持续的能量爆发
The mammals had gone from tiny land animals... 哺乳动物从微小的陆地动物
allowing the giants of today to evolve. 使如今的巨兽得以进化