Biodegradability
生物可降解性
🗣️ 情景例句
Please, use the phone.
请随便用。
Did you go to the circus last night?
你昨晚去看马戏了吗？
Last week No.14 Middle School held a sports meeting on the playground.
上星期第十四中学在操场举行了一次运动会。