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1·This paper introduces a measuring method and the result of the elastic modulus for human menisci, articular cartilage and photoelastic simulation material.

介绍了人体半月板和关节软骨以及其光弹性模拟材料弹性模量的测定方法与结果。

2·Sharks have a different structure to most fish: instead of a skeleton made of bone, I hey have a tough elastic skeleton of cartilage.

鲨鱼与多数鱼类的骨架不同，它有结实、有弹性的软骨骨架，而不是骨头组成的骨架。