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.
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。
Compressed air he's not so enthusiastic about in this scenario.
在当前的情况下，他对压缩空气的热情不大。
Compressed-air energy storage USES air compressors to store electricity generated when it's not needed.
压缩空气储能利用空气压缩机将闲置电力储存起来。
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