也正是这个原因，我们种族继续保持了一种水里的真空牵引结构来推动自身从一处行进到另一处，包括在墙和岩石上以垂直向上或是上下颠倒的方向爬行。

It is also for this reason that our species continues with an underwater form of vacuum traction that propels us from one place to another including upside down or straight up walls and rocks.

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