英语听力：自然百科 野性俄罗斯之西伯利亚 Siberia—14

 But hot tempers on a hot rock beats being on the outside trying to get in. This exclusive resort, isn’t accepting new guests.

 

Come evening, a cool mist hangs over the lake, as the last of the egg-laying caddis flies get picked off by ducks and bears.

 

Brown bears are crepuscular¹, preferring to venture out at dawn or dusk. They have a fantastic sense of smell, and can track the scent² of the carcass for over three kilometers. But they are not alone in that respect. Two predators³ are after the same prize, but there is no way a fifty-kilogram wolf will challenge a 500-kilogram bear. Getting in first, the weaker wolf steals what it can, a large leg bone, but stopping to watch its back is a mistake.

1 crepuscular   

adj.晨曦的；黄昏的；昏暗的

参考例句：

• Bats are crepuscular creatures.蝙蝠是在黎明或黄昏时分活动的动物。
• It has nothing to do with walk,this is called a crepuscular walk.这和散步没有任何关系，这叫黄昏漫步。

2 scent   

n.气味，香味，香水，线索，嗅觉；v.嗅，发觉

参考例句：

• The air was filled with the scent of lilac.空气中弥漫着丁香花的芬芳。
• The flowers give off a heady scent at night.这些花晚上散发出醉人的芳香。

3 predators   

n.食肉动物( predator的名词复数 )；奴役他人者（尤指在财务或性关系方面）

参考例句：

• birds and their earthbound predators 鸟和地面上捕食它们的动物
• The eyes of predators are highly sensitive to the slightest movement. 捕食性动物的眼睛能感觉到最细小的动静。 来自《简明英汉词典》