Biodegraded
vt. 生物递降分解（biodegrade的过去式与过去分词形式）
🗣️ 情景例句
The robber struck him on the head.
强盗打他的头。
How long have you been studying English?
你学了多长时间的英语了？
It usually comes in February or March. Summer is often very hot.
通常在2月或3月开始。夏天很热。