英语听力：自然百科 黄石公园的夏天 Yellowstone—14

 Bison lose the last of their winter coats. In the heat, tempers fray¹.

 

To escape soaring ground temperatures, cowbirds choose a bison's back as a cool place to feed and catch the breeze. Biting insects now become a draining nuisance.

 

A grizzly² bear escapes the heat and bugs³ in the cool waters of a lake.

As the ground dries, bears find little food to eat out on the Yellow Stone plateau. There is less to graze and digging roots is hard work. So they start to head to the cooler mountains beyond. 

 

In the mountains, glacier⁴ lilies that finished flowering a month before on the plateau are only just coming into bloom. Up here, where spring has only just arrived, bears can find food again.

1 fray   

v.争吵；打斗；磨损，磨破；n.吵架；打斗

参考例句：

• Why should you get involved in their fray?你为什么要介入他们的争吵呢？
• Tempers began to fray in the hot weather.大热天脾气烦燥。

2 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。

3 bugs   

adj.疯狂的，发疯的n.窃听器( bug的名词复数 )；病菌；虫子；[计算机]（制作软件程序所产生的意料不到的）错误

参考例句：

• All programs have bugs and need endless refinement. 所有的程序都有漏洞，都需要不断改进。 来自《简明英汉词典》
• The sacks of rice were swarming with bugs. 一袋袋的米里长满了虫子。 来自《简明英汉词典》

4 glacier   

n.冰川，冰河

参考例句：

• The glacier calved a large iceberg.冰河崩解而形成一个大冰山。
• The upper surface of glacier is riven by crevasses.冰川的上表面已裂成冰隙。