convection zone of the sun

常见例句

双语例句

• The convection zone reaches up to the sun's surface, and makes up 66 percent of the sun's volume but only a little more than 2 percent of its mass.
  对流区的范围直达太阳表面，占有太阳体积的66％，但只有太阳质量的2％多一点儿。
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