英语语法分析

And, since they were created underground and not from flowing surface water, not all these passageways have an opening to the outside world.

并且，由于它们是在地下形成的，而不是由地表水流形成，所以并不是所有的通道都有通向外部世界的开口。

You get bigger cracks and then passageways being formed along the openings in the rock and it's all underground.

你会看到更大的裂缝，然后是沿着岩石的开口形成的通道，这些都在地下。

The ribbons block passageways between molecules that normally exist in plastic.

这些薄条阻断了塑料分子之间通常存在的通道。