The interface structure of composite consists of core material diffusion layer, chilling solidified layer, directional growth layer, and cellular granular layer.

复合材料界面结构由芯材扩散层、激冷凝固层、方向性生长层和胞状晶粒层组成。

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"The extra layer of growth tells the story of their voyage to the bottom of the seabed, " he added.

CNN: March 11, 2013 -- Updated 1910 GMT (0310 HKT)

Piers, jetties and seawalls with a protective layer of marine growth absorb wave action better.

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When you layer in population growth in U.S. cities (projected to hit 400 million people in the next 40 years), those numbers become larger every year, and the hard reality is that we are running out of water.

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