天文学家也一直持相似结论：当太阳燃烧、膨胀以至于它的表面触碰到地球之时，地球将被这个巨大火球所毁灭。
Astronomers have long come to a similar conclusion: that the Earth will be obliterated by a giant fireball as the sun burns up and expands so that its surface touches the planet.
然而，这并不能完全解释出外向燃烧的红色膨胀气体的来源。
This doesn't fully explain the source of the red-glowing outwardly expanding gas, however.
内燃发动机在气缸里燃烧燃料，并将燃烧所产生的膨胀力转变成旋转力，用以推动车辆前进。
The internal combustion engine burns fuel within the cylinders and converts the expanding force of the combustion or "explosion" into rotary force used to propel the vehicle.
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