美国科学60秒 SSS 2013-05-07
时间：2019-01-20 作者：英语课 分类：Scientific American(五)月
When summer hits, I dread 1 jogging outside. But a study finds that elephants can be in true danger in the heat. As creatures get bigger, they have smaller surface area to body volumn ratios. Fully-grown Asian eleplants thus pack a lot of mass into a body with a relatively 2 small surface area. And surface area limits how much body heat you can dissipate. For the study, two female elephants in the Audubon zoo in New Orleans walked around a half mile track under various conditions. The outdoor temperature during the sessions ranged from a chilly 3 8 degree celsius 4 to a scorching 5 35 degrees. Sunny hot day is where the worst. The already limited hide is now itself heated by the sun. With the equivlent of a busted 6 radiator 7, the elephants retained 56% to 100% of their body heat internally, which could make a mere 8 four hours of exercise, fatal. The research on the elephant exertion 9 is in the journal of Experimenal Biology. Fortunately, elephants have ways to beat the heat: shift activity to after-dark and, of course, go for a dip.
- We all dread to think what will happen if the company closes.我们都不敢去想一旦公司关门我们该怎么办。
- Her heart was relieved of its blankest dread.她极度恐惧的心理消除了。
- The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
- The operation was relatively painless.手术相对来说不痛。
- I feel chilly without a coat.我由于没有穿大衣而感到凉飕飕的。
- I grew chilly when the fire went out.炉火熄灭后，寒气逼人。
- The temperature tonight will fall to seven degrees Celsius.今晚气温将下降到七摄氏度。
- The maximum temperature in July may be 36 degrees Celsius.七月份最高温度可能达到36摄氏度。
- a scorching, pitiless sun 灼热的骄阳
- a scorching critique of the government's economic policy 对政府经济政策的严厉批评
- The two ends of the pipeline are connected with the radiator.管道的两端与暖气片相连接。
- Top up the radiator before making a long journey.在长途旅行前加满散热器。
- That is a mere repetition of what you said before.那不过是重复了你以前讲的话。
- It's a mere waste of time waiting any longer.再等下去纯粹是浪费时间。