The air erupted into a blurred sphere of explosive force.
空气喷发成一个爆炸力的模糊球体。
Experiment with a helium balloon, a hot air balloon, or a rigid sphere filled with different gases. Discover what makes some balloons float and others sink.
进行实验的是氦气球——热气球，或者一个充了不同气体的刚性球体。探究是什么让气球飘起来，而让其他物体沉下去。
Star has many characters, it is a huge air mass, and also has huge mass, it forms a gaseous sphere with great pressure force and uneven distributed mass under the effect of gravitation.
恒星有着许多特性，它是一个巨大的气团，并且有着同样巨大的质量，在万有引力的作用下形成一个有着巨大压力的、质量分布不均的气体球。
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