(单词翻译:单击)
听力文本
It seems wild elephants don't need a full eight hours of sleep every night to maintain one of the longest memories in the animal kingdom.
野生大象似乎不需要每晚睡八小时来维持动物王国里拥有最长记忆的头衔。
According to one team of scientists in South Africa, wild elephants sleep an average of just two hours a night,that's less than any other animal on record.
根据南非一组科学家的研究，野生大象平均每晚只睡两个小时，这比其它任何动物都要少。
That's surprising because elephants are known for their incredible memories. And studies have shown that sleep and memory are connected.
这是令人惊讶的，因为大象以其令人难以置信的记忆而闻名。研究表明睡眠和记忆是相互联系的。
The team also found the pair of wild African elephants it tested slept in bursts. They slept both lying down and standing up. And sometimes, they didn't sleep at all.
研究小组还发现他们测试的这对野生非洲大象睡一会儿就会突然醒来。它们躺着和站着都能睡。有时，他们根本不睡觉。
Sleep experts are taking the study into account, but others say it's possible wild elephants have evolved to thrive with little or no sleep. The enormous mammals are busy eating 17 to 18 hours each day.
睡眠专家正在考虑这项研究，但也有人说，野生大象可能已经进化到需要很少或根本不需要睡眠。这个体型庞大的哺乳动物每天有17到18个小时忙着进食。
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词汇解析
1、maintain
维持;保持
The Department maintains many close contacts with the chemical industry.
这个部门与化工行业保持着众多密切的联系。
Push yourself to make friends and to maintain the friendships.
要求自己与人交友并保持友谊。
断言;宣称;坚称
He has maintained that the money was donated for international purposes.
他坚称这笔捐款将用于国际用途。
Prosecutors maintain no deal was made.
原告坚持说不存在任何交易。
保持，维持（在某一比率或水平上）
The government was right to maintain interest rates at a high level.
政府维持高利率的做法是正确的。
action is required to ensure standards are maintained at as high a level as possible.
要求采取行动确保标准维持在尽量高的水平上。
2、evolve
进化；演变
The bright plumage of many male birds has evolved to attract females.
很多雄鸟进化出鲜艳的羽毛是为了吸引雌鸟。
Maize evolved from a wild grass in Mexico.
玉米是从墨西哥的一种野生禾本植物进化而来的。
（使）逐步发展;（使）演化
a tiny airline which eventually evolved into Pakistan International Airlines.
最终发展成巴基斯坦国际航空公司的一家小型航空公司
Popular music evolved from folk songs.
流行音乐从民歌演变而来。
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