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 course I took was above me.
我上的这门课太难了。
We can't decide where to go.
我们不能决定去那里。
We can start over here.
我们可以从这里开始。