留美老师带你每日说英文 第419期:和硬币一样直径的黑洞(在线收听

   台湾籍旅美老师今天交给我们的句子是:

  In fact, a black hole with the diameter of a nickel would be slightly more massive than the Earth. It would have a surface gravity a billion billion times greater than our planet currently does.
  事实上,和硬币一样直径的黑洞其质量比地球还稍稍重一些,它的表重力,比我们现在的星球还大上数百亿倍。
  原文地址:http://www.tingroom.com/lesson/mrsyw/327298.html