The Earth's crust is thought to be divided into huge, movable segments, called plates, which float on a soft plastic layer of rock.

人们认为地壳分成了巨大的、可移动的部分，称为板块，这些板块漂浮在柔软可塑的岩石层上。

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The appearance of the stated plastic layer 4 is consistent with the existing nut.

上述塑料层4的外形与现有的螺帽一致。

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The contact surface of the sole (1) and the ground is provided with a wearable rubber or plastic layer (7).

此鞋底(1)与地接触面设有耐磨橡胶或塑料层(7)。

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It combines a strand of standard plastic with a layer made from a "smart" material that can absorb water.

BBC: TED 2013: 4D printed objects 'make themselves'

Landfills without the benefit of a naturally impermeable layer use plastic liners and imported clay.

ECONOMIST: The charms of modern landfills

Now each layer of plastic is as thin as a sheet of copy paper, resulting in smooth printed prototypes.

ENGADGET: MakerBot unveils Replicator 2, 2X and launches retail store, we go eyes-on