Biodegradation
生物降解
🗣️ 情景例句
I'm really concerned about them,
我真的为他们担心，
I hope you will be able to do a good business with the Chinese as well as customers of other countries.
我希望你们能够和包括中国在内的各国客户做成交易。
Are there any birds in the picture?
画里面有鸟吗？