英语听力：自然百科 大堡礁 自然奇迹(23)

Within half an hour, the fish is completely enveloped¹ in a slimy cocoon², which traps its smell.

不到半个小时，鹦鹉鱼就整个包裹在一个防止气味外泄的黏糊糊的茧里了。

But not all the reef hunters are fooled.

但道高一尺魔高一丈。

White tipped reef sharks do use smell to find their prey⁴.

白顶礁鲨的确通过气味来寻找猎物。

But if that doesn't work, they have another sense.

但如果这个不管用，它们还另有妙招。

They can detect an animal's bioelectrical energy, the tiny electrical signals given off by even the smallest of its twitching⁵ muscles.

鲨鱼能探测到其他动物身上的生物电能，即使是由微笑的抽搐引发的电流。

This resting parrotfish risks discovery every time it moves a fin³ or wafts⁶ its gills.

鹦鹉鱼每次移动鱼鳍或者鼓动鱼鳃都有被鲨鱼发现的危险。

As the sharks pass, it holds its breath.

当鲨鱼游过时，鹦鹉鱼都屏住呼吸。

But sharks don't give up that easily.

但鲨鱼不会这样轻易放弃。

White tips are the perfect size and shape for hunting in this cramped⁷ spaces.

而白顶鲨的尺寸和形状都极为适合在这些狭窄的礁石缝隙中捕猎。

1 enveloped   

v.包围，笼罩，包住( envelop的过去式和过去分词 )

参考例句：

• She was enveloped in a huge white towel. 她裹在一条白色大毛巾里。
• Smoke from the burning house enveloped the whole street. 燃烧着的房子冒出的浓烟笼罩了整条街。 来自《简明英汉词典》

2 cocoon   

n.茧

参考例句：

• A cocoon is a kind of silk covering made by an insect.蚕茧是由昆虫制造的一种由丝组成的外包层。
• The beautiful butterfly emerged from the cocoon.美丽的蝴蝶自茧中出现。

3 fin   

n.鳍；(飞机的)安定翼

参考例句：

• They swim using a small fin on their back.它们用背上的小鳍游动。
• The aircraft has a long tail fin.那架飞机有一个长长的尾翼。

4 prey   

n.被掠食者，牺牲者，掠食；v.捕食，掠夺，折磨

参考例句：

• Stronger animals prey on weaker ones.弱肉强食。
• The lion was hunting for its prey.狮子在寻找猎物。

5 twitching   

n.颤搐

参考例句：

• The child in a spasm kept twitching his arms and legs. 那个害痉挛的孩子四肢不断地抽搐。 来自《现代汉英综合大词典》
• My eyelids keep twitching all the time. 我眼皮老是跳。 来自《现代汉英综合大词典》

6 wafts   

n.空中飘来的气味，一阵气味( waft的名词复数 )；摇转风扇v.吹送，飘送，（使）浮动( waft的第三人称单数 )

参考例句：

• A breeze wafts the sweet smell of roses. 微风吹来了玫瑰花的芬芳（香味）。 来自《现代汉英综合大词典》
• A breeze wafts the smell of roses. 微风吹送玫瑰花香气。 来自《现代汉英综合大词典》

7 cramped   

a.狭窄的

参考例句：

• The house was terribly small and cramped, but the agent described it as a bijou residence. 房子十分狭小拥挤，但经纪人却把它说成是小巧别致的住宅。
• working in cramped conditions 在拥挤的环境里工作