Silk offers an alternative for scaffolds engineering for its biocompatibility, unique mechanical properties and slow rate of degradation.

蚕丝具有生物相容性、优异力学性能、较慢的降解速度，为组织工程支架的构建提供了新的选择。

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The results of measurement of the properties shows that the brittleness of chitosan films is considerably improved, and the rate of degradation of connect films by caprolactone is reduced.

结果表明，在一定温度及催化剂下，己内酯低聚物与壳聚糖分子接枝混杂，形成的材料膜改善了壳聚糖膜的脆性，并显示出良好的降解性。

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The Aichi targets call for a significant reduction in the rate of loss, degradation and fragmentation of all natural habitats, including forests, by 2020.

爱知目标要求到2020年大幅度降低包括森林在内的所有自然生境的丧失、退化和条块分割速度。

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Although the devaluation of sterling we've seen in the last few years - caused by a near-zero official interest rate and the massive money creation of quantitative easing - has probably been healthy, especially for exporters, more extreme degradation of the currency would bring risks.

BBC: Can the Bank of England hit any target?