convection zone of the sun

常見例句

雙語例句

• 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.
  對流區(qū)的范圍直達太陽表面，占有太陽體積的66％，但只有太陽質(zhì)量的2％多一點兒。
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