Such stars eventually blow off the material of their outer layers, which creates an expanding shell of gas called a planetary nebula.
这样的恒星最终炸开了它们的外层物质，形成了向外扩展的气体盔甲，名为行星状星云。
The outer shell of the sphere is heat dissipating, allowing it to penetrate shields, and is built of a shock absorbing material.
用减震材料制成的球体外壳能散热，使蜂鸣机器人可以穿透护盾。
The outer shell of the sphere is heat dissipating, allowing it to penetrate shields, and is built of a shock absorbing material.
用减震材料制成的球体外壳能散热，使蜂鸣机器人可以穿透护盾。
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