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The introduction of the nano-texture on PDMS not only increased the refilling speed of the resin by two times and reduced the printing time by nearly 25 % , and the printing reliability of larger crosB-sectional areas was remarkably improved.Download : Download high-res image ( 272 Fracture , the breakdown of materials as cracks advance , is one of the most intriguing materials phenomena ; it can happen even to very tough biological tissues including tendons , skin , bone and teeth , materials whose critical physiological functions can be compromised by structural irregularities .
 resin, reliability, areas, high-res image, Fracture, materials, as, materials, biological tissues, bone, materials, be
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 resin, reliability, areas, high-res image, Fracture, materials, as, materials, biological tissues, bone, materials, be