In this paper, the advances in research of chemical degradation, physicaldegradation and biodegradation were discussed.
本文介绍并评述了化学降解、物理降解和生物降解等壳聚糖降解方法的研究进展。
2
Globally, soil erosion, chemical deterioration and physicaldegradation are the important forms amongst various types of soil degradation.
土壤侵蚀、化学退化、物理退化是全球范围内最主要的退化形式。
3
The usual metaphor for this is "glacial", which is apt since the retreat of the glaciers (and polar ice caps) tells us the primary datum of the decade has been physicaldegradation of the planet.