Biodegradability
生物可降解性
??? 情景例句
Please, use the phone.
請隨便用。
Did you go to the circus last night?
你昨晚去看馬戲了嗎？
Last week No.14 Middle School held a sports meeting on the playground.
上星期第十四中學在操場舉行了一次運動會。