The park is a beautiful spot that juts into the Mediterranean and is surrounded by rocky ledges that the waves crash up against.
这是一个伸入到地中海中的美丽公园,四周的嶙峋怪石被海浪不断地冲刷着。
So Saturn might once have had more-one of which could have had a rocky core surrounded by a shell of water ice.
因此,土星也许曾经拥有多个颗卫星,其中一颗可能是冰层包裹着岩石内核的样子。
A region of gas and dust from exploding stars in the Milky Way galaxy starts to collapse under its own gravity, forming a small star surrounded by a disk of rocky material and gas.
银河系漩涡展开过程中某些区域的星群之气体尘埃在引力作用下,形成由岩石物质和气体包围的小行星。
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