Aircraft use lift from their wings to stay aloft, while submarines operate like underwater balloons, adjusting their buoyancy to sink or rise.
2
它的运行原理就像水下的热气球，因为气球里的汽油能够被压缩，所以它能够在很大的压力下保持其形状。
It worked like a hot air balloon underwater, since the petrol in the balloon could not be compressed, so it could keep its shape even in great pressure.
3
孔明灯和热气球，其实是一个原理。
Kongming lanterns and hot-air balloons are based on the same principle.
点击反馈