英語聽力：長毛象王國-14

Arctic ground squirrels hibernate like other small mammals, but with a unique twist. They can lower their body temperature right down to almost minus 3 degrees centigrade. But thanks to a biochemical super-cooling process, they don’t actually freeze.

Every few weeks, they warm up temporarily through bouts of shivering which probably helps to ward off permanent brain damage from the cold. This deep sleep tactic helps the ground squirrels to conserve energy. But it’s a high-risk strategy, and some just don’t wake up. 30,000-year-old frozen ground squirrels have been discovered, still preserved in the underground tombs.

Every inhabitant of Beringia had to have its own way of dealing with the cold, and that included those first people who arrived across the Bering Land Bridge. They knew how to make weapons and cooperate to hunt for food. They made weather-proof clothing out of animal hides and had fire to keep them warm. Without these skills, they couldn’t have survived the endless winters.

But spring bring broughteasier times and excellent hunting opportunities. Spring was when Beringia’s big game gave birth to their young.

1 hibernate

v.冬眠，蟄伏

參考例句：

Bears often hibernate in caves.熊常在山洞里冬眠。

Some warm-blooded animals do not need to hibernate.一些溫血動物不需要冬眠。

2 bouts

n.拳擊(或摔跤)比賽( bout的名詞復(fù)數(shù) );一段(工作);(尤指壞事的)一通;(疾病的)發(fā)作

參考例句：

For much of his life he suffered from recurrent bouts of depression. 他的大半輩子反復(fù)發(fā)作抑郁癥。 來自《簡明英漢詞典》

It was one of fistiana's most famous championship bouts. 這是拳擊界最有名的冠軍賽之一。 來自《現(xiàn)代英漢綜合大詞典》

3 ward

n.守衛(wèi)，監(jiān)護，病房，行政區(qū)，由監(jiān)護人或法院保護的人(尤指兒童);vt.守護，躲開

參考例句：

The hospital has a medical ward and a surgical ward.這家醫(yī)院有內(nèi)科病房和外科病房。

During the evening picnic,I'll carry a torch to ward off the bugs.傍晚野餐時，我要點根火把，抵擋蚊蟲。

4 tactic

n.戰(zhàn)略，策略;adj.戰(zhàn)術(shù)的，有策略的

參考例句：

Reducing prices is a common sales tactic.降價是常用的銷售策略。

She had often used the tactic of threatening to resign.她慣用以辭職相威脅的手法。

5 conserve

vt.保存，保護，節(jié)約，節(jié)省，守恒，不滅

參考例句：

He writes on both sides of the sheet to conserve paper.他在紙張的兩面都寫字以節(jié)省用紙。

Conserve your energy,you'll need it!保存你的精力，你會用得著的!

6 dealing

n.經(jīng)商方法，待人態(tài)度

參考例句：

This store has an excellent reputation for fair dealing.該商店因買賣公道而享有極高的聲譽。

His fair dealing earned our confidence.他的誠實的行為獲得我們的信任。