These are infragravity waves, so called because they are sub-harmonics of the originalgravity waves.
这就是亚重力波，之所以这样命名是因为它们是原始重力波的分谐波。
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The play on gravity is mind-boggling – while foam and cardboard appear as weightless as their original counterparts, the concrete bags at center stage look every bit as heavy as their 60 lb originals.
Other legends tell that he is an ancient being of strange gravity, the abyss personified-a twisted voice from out the original darkness, before the first light in the universe.