Next is the radiative zone, which extends from the core to 70 percent of the way to the sun's surface, making up 32 percent of the sun's volume and 48 percent of its mass.

接下来是辐射区，其范围从核心表面到太阳半径的70%处，占太阳总体积的32%，总质量的48%。

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Below the convective zone lies a radiative zone, which is a calmer region, where photons transport the Sun's energy outward.

BBC: Sun, Trace