Indeed, hawk can spot a small ground mammal miles high in the sky with ease, descending so rapidly and then taking of the prey necessary to survive and feed our young.
的确，鹰能从数英里的高空轻松发现小块哺乳动物群，并疾速下降捕捉必要的猎物来幸存或哺育后代。
2
Fish and ocean mammal have excellent propulsion and maneuvering system, whose advantages are high efficiency and low noise.
鱼类和海洋哺乳动物有良好的推进系统和操纵系统，其突出的优点是效率高、噪声低。
3
Researchers in the field search for mammal fossils in the High Arctic in 2004.