Powerful flukes can propel a whale for many days without a single stop. Such stamina is extraordinary, yet these leviathans will need continued human help to survive.

• 强有力的尾部能一刻不停地推动一头蓝鲸游上许多天，这等耐力十分惊人。然而，这些庞然大物还需要人类不断提供帮助才能世代存续下去。.