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          > 在線聽力 > 英語高級聽力 > 英語時差 >  第286課

          英語時差:雪會說話?2

          所屬教程:英語時差

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          xijijun

          2019年10月02日

          手機版
          掃描二維碼方便學習和分享
          https://online2.tingclass.net/lesson/shi0529/10000/10183/286.mp3
          http://image.tingclass.net/statics/js/2012
          Snowflakes are small ice crystals. Snowflakes near their melting temperature can, through hand pressure, be made to fuse into a snowball by a process of melting and re-freezing. The snow yields to pressure “gently and progressively” and doesn’t make sound. On the other hand, if the snow is very cold, far below its melting temperature, even the pressure of a boot heel or a wagon wheel won’t melt it. The snow is powdery and won’t form snowballs. Instead, pressure just makes the ice crystals crush and slip over each other as dry particles. That “abrupt and jerky” motion of the dry ice crystals causes vibration and sound, according to Humphreys’ book. So W.J. Humphreys claimed that snow creaks when the weather is very cold, but not when the weather is only moderately cold. Does that claim jibe with your experience?
          內容來自 聽力課堂網:http://www.ly011.com/show-10183-454353-1.html
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