美国科学60秒 SSS 2012-12-19
时间：2018-12-24 作者：英语课 分类：Scientific American(十二)月
英语课
Humpback whales sing most frequently where and when they breed. But researchers have just discovered that whales can sing complex songs even when diving and foraging 1, when it’s neither the time nor the place for mating behaviour. The study is published in journal PLoS ONE.
Researchers tagged ten humpback whales with section-cup sensors 2 and tracked each mammal for a full day in Antarctic waters during the fall, the time and place when whales feed rather than breed. While the sensors picked up background song near all of the whales. Two individuals preformed long, complex songs more suited to mating behaviour. They even sang while on feeding lungs more than 100 meters below the surface.
The fact that these whales can vocalize even under widely different water pressures, may help us figure out how they produce their songs. And more important, the overlap 3 in breeding and feeding activities proves humpback and other baleen 4 whales are way more behaviorally flaxible than we thought. Unlike some human singers, they are definitely not one-hit wonders.
This post was generated by put listening repetition system, Check the original dictation thread!
1 foraging
v.搜寻（食物），尤指动物觅（食）( forage的现在分词 )；（尤指用手）搜寻（东西）
- They eke out a precarious existence foraging in rubbish dumps. 他们靠在垃圾场捡垃圾维持着朝不保夕的生活。 来自《简明英汉词典》
- The campers went foraging for wood to make a fire. 露营者去搜寻柴木点火。 来自辞典例句
2 sensors
n.传感器，灵敏元件( sensor的名词复数 )
- There were more than 2000 sensors here. 这里装有两千多个灵敏元件。 来自《简明英汉词典》
- Significant changes have been noted where sensors were exposed to trichloride. 当传感器暴露在三氯化物中时，有很大变化。 来自辞典例句