英语听力：自然百科 冰冻星球 前往地球尽头—13

 And fishing can be dangerous. A southern sea lion. It uses the speed of a breaking wave to catch up with the gentoos. Sea lions normally eat fish. So he is used to catching¹ streamline² swimmers. But the gentoos seem more than his match-up at sea. He must change tactics. Perhaps it would be easier in the shallows. But, no, it seems penguins³ are uncatchable in water. How about on land? The penguin's wings are so powerful for swimming, but of no help when it comes to running. Now surely the sea lion has a chance. But on the beach both are like fish out of water. Rarely do hunter and hunted play their roles with so little skill. The outcome is anyone's guess.

1 catching   

adj.易传染的，有魅力的，迷人的，接住

参考例句：

• There are those who think eczema is catching.有人就是认为湿疹会传染。
• Enthusiasm is very catching.热情非常富有感染力。

2 streamline   

vt.使成流线型；使简化；使现代化

参考例句：

• We must streamline our methods.我们必须简化方法。
• Any liquid or gas passing it will have streamline flow.任何通过它的液体或气体将呈流线型的流动。

3 penguins   

n.企鹅( penguin的名词复数 )

参考例句：

• Why can penguins live in cold environment? 为什么企鹅能生活在寒冷的环境中？ 来自《简明英汉词典》
• Whales, seals, penguins, and turtles have flippers. 鲸、海豹，企鹅和海龟均有鳍形肢。 来自《现代英汉综合大词典》