课程咨询

托福考试网 托福资料下载 托福资讯 0元讲座 水平测试

托福考试练习
新东方在线 > TOEFL > 托福听力 > 正文
托福培训

扫码免费领资料

内含托福全科备考资料

更有免费水平测试及备考规划

托福培训

扫码关注掌握一手留学资讯

回复XDF免费水平测试

录播精讲 直播课HOT

托福听力练习-科学美国人60秒:狼嚎是为找同伴

2017-03-02 10:25:00来源：科学美国人60秒

点击查看>>科学美国人60秒音频：狼嚎是为找同伴

　　科学美国人60秒中英文翻译：狼嚎是为找同伴

　　科学美国人60秒英文文本

　　Wolves Howl For Pals, Not Leaders

　　The lone wolf’s howl has long been chosen as a symbol of melancholy and loss. Now researchers have demonstrated that the choice was accurate. Howling is not related to the stress level of the crying canine or the dominance status of the departing wolf; the best predictor of a wolf’s howl is the closeness of the howler’s relationship with the wolf leaving its side. The study is in the journal Current Biology.

　　The researchers separated individuals living in Austria’s Wolf Science Center. They recorded the resulting howls for 20 minutes after separation. Then the scientists took a sample of saliva from the howling wolves to measure circulating levels of cortisol, a hormonal stress indicator.

　　Cortisol levels increased during all separations, whether a preferred partner or any other pack mate was taken away. But howling was much more pronounced when a close partner was removed.

　　The researchers thus concluded that the level of howling was determined by the relationship of the howler with the separated wolf, regardless of the removed wolf’s rank. Because even a wolf, apparently, can have a best friend.

　　中文翻译请点击下一页

本文关键字: 托福听力练习 科学美国人60秒

上一页 1 2 下一页

托福辅导

关注新东方在线托福

托福机经·Official题目练习

考前重点突破·听说读写海量资料

更多资料

关注新东方在线托福，
回复【XDF】获取大礼包

托福辅导
  • 1.打开手机微信【扫一扫】，识别上方二维码；
  • 2.点击【添加】，回复对应关键字领取学习资料。
更多>>
更多内容

免费获取托福备考大礼包

微信扫描下方二维码 立即领取

托福辅导
更多>>
更多公益讲座>>
更多>>
更多资料
托福TPO 托福听力练习 托福口语练习 托福阅读练习 托福写作练习
我要
反馈 返回
首页
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10