英语听力：自然百科 黄石公园的夏天 Yellowstone—18

 But just as the first of Yellowstone's new generation are preparing to leave, its last visitors are arriving. Night after night, army cutworm moths² have been escaping the heat of a distant prairie. They have been flying in on favorable winds, hiding away in / rock crevices³ in the mountains. This is why the grizzly⁴ bears climb to the barren peaks. Two miles up, they / begin to search for the moths. 

 

It is the end of summer, and the last snow of winter holds on only here. It offers a few refreshing⁵ mouthfuls for travel-weary cubs⁶. 

 

Many of these bears learnt about this site from their mothers, as a part of local bear tradition. The family sets to work, finding moths, digging into the loose rock. 

 

Though each moth¹ is very small, a bear that makes a successful strike can harvest up to 40,000 in a single day, that is 20,000 calories and vital weight gained for winter. 

 

Having spent all summer avoiding males, the mother now finds one much too close for comfort. Perhaps she is seeking a mate, but he is unwelcome. Leaving her cubs, she confronts the male head-on.

 

1 moth   

n.蛾，蛀虫

参考例句：

• A moth was fluttering round the lamp.有一只蛾子扑打着翅膀绕着灯飞。
• The sweater is moth-eaten.毛衣让蛀虫咬坏了。

2 moths   

n.蛾( moth的名词复数 )

参考例句：

• The moths have eaten holes in my wool coat. 蛀虫将我的羊毛衫蛀蚀了几个小洞。 来自《简明英汉词典》
• The moths tapped and blurred at the window screen. 飞蛾在窗帘上跳来跳去，弄上了许多污点。 来自《现代英汉综合大词典》

3 crevices   

n.（尤指岩石的）裂缝，缺口( crevice的名词复数 )

参考例句：

• It has bedded into the deepest crevices of the store. 它已钻进了店里最隐避的隙缝。 来自辞典例句
• The wind whistled through the crevices in the rock. 风呼啸着吹过岩石的缝隙。 来自辞典例句

4 grizzly   

adj.略为灰色的，呈灰色的；n.灰色大熊

参考例句：

• This grizzly liked people.这只灰熊却喜欢人。
• Grizzly bears are not generally social creatures.一般说来，灰熊不是社交型动物。

5 refreshing   

adj.使精神振作的，使人清爽的，使人喜欢的

参考例句：

• I find it'so refreshing to work with young people in this department.我发现和这一部门的青年一起工作令人精神振奋。
• The water was cold and wonderfully refreshing.水很涼，特别解乏提神。

6 cubs   

n.幼小的兽，不懂规矩的年轻人( cub的名词复数 )

参考例句：

• a lioness guarding her cubs 守护幼崽的母狮
• Lion cubs depend on their mother to feed them. 狮子的幼仔依靠母狮喂养。 来自《简明英汉词典》