英语听力 学英语,练听力,上听力课堂! 注册 登录
> 在线听力 > 英语高级听力 > 英语时差 >  第743课

英语时差:冰川渐渐融化

所属教程:英语时差

浏览:

xijijun

2021年01月13日

手机版
扫描二维码方便学习和分享
https://online2.tingclass.net/lesson/shi0529/10000/10183/743.mp3
https://image.tingclass.net/statics/js/2012
Ya?l: Hey Don, whatch'a doing?

Don: Booking a trip to Glacier National Park. I want to go there before the glaciers disappear.

Y: What do you mean?

D: Scientists predict that within twenty years the park's remaining glaciers will melt away.

Y: Why?

D: Whether it's because of human industry or natural cycles, temperatures are rising. And when temperatures rise, glaciers melt.

Y: Forgive me for sounding insensitive, but so what? Glaciers are nice to look at, but what difference will it make if they melt?

D: Glaciers are more than just pretty pictures. They're the main sources for many rivers that people depend on for drinking water, irrigation, and hydroelectric power.

Y: So are rivers drying up?

D: Not yet, but the amount of glacier water affects a river's flow volume. The lower the flow volume the less water there is for drinking, power, and everything else people depend on rivers for. Also, greater water volume helps dilute a river's chemical content. The less water a river has, the higher the chemical concentration, which can pollute a lake fed by the river.

Y: I didn't know that. But how about this...Higher temperatures mean that more water will evaporate from the oceans, which means more precipitation, including snow. So maybe some glaciers will actually grow even though it's getting warmer.

D: Some scientists make that argument, but most don't buy it. Sure, some glaciers are growing temporarily thanks to unusual amounts of snow, but they're the exception to the rule. Generally, glaciers grow when the amount of snow that melts in the summer is less than the amount that falls in the winter. Right now, more snow is melting than falling.

Y: I guess you should book that trip.

用手机学英语,请加听力课堂微信公众号:tingclass123
用户搜索

疯狂英语 英语语法 新概念英语 走遍美国 四级听力 英语音标 英语入门 发音 美语 四级 新东方 七年级 赖世雄 zero是什么意思

  • 频道推荐
  • |
  • 全站推荐
  • 广播听力
  • |
  • 推荐下载
  • 网站推荐