Biodegradation
生物降解
🗣️ 情景例句
Yes, I have a terrible cold.
是的，我得了重感冒。
Her life was devoted to caring for the sick and needy.
她一生致力于照顾病人和穷人。
At last firemen have put out a big forest fire in California.
消防队员们终于扑灭了加利福尼亚的一场森林大火。