degrade
US /dɪˈɡreɪd/
UK /dɪˈɡreɪd/

1.
2.
降解, 分解
break down or deteriorate chemically
:
•
Plastic bags can take hundreds of years to degrade.
塑料袋可能需要数百年才能降解。
•
The old wooden fence began to degrade after years of exposure to the elements.
旧木栅栏在经历多年的风吹日晒后开始腐朽。