The core could be very, very rich in hydrogen (a water ingredient) or totally dry.
地核中可能有巨量的氢（水分子的一种组分）或者完全干燥。
The entire system is rich in hydrogen gas, the stuff of which stars are made.
整个系统是氢气，其恒星的东西丰富了。
The entire system is rich in hydrogen gas, the stuff of which stars are made.
整个系统是氢气，其恒星的东西丰富了。
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