Biodegradation
生物降解
🗣️ 情景例句
You must be Robbie.
你就是Robbie吧。
You walk so fast that I can't keep up with you.
你走得太快，我跟不上你。
I sat down at the breakfast table in an exhausted condition.
然后坐到桌边吃早饭，一副筋疲力尽的样子。