Biodegradation
生物降解
🗣️ 情景例句
Are all the classes within walking distance?
所有的教室都在步行范围之内吗？
You can never tell.
不知道。
you might include a couple of heady growth stocks in your portfolio,alongside your more pedestrian in vestments.
你可在投资组合中包括几项有令人陶醉的增值前景的增长股，和其他比较平淡的投资项目放在一起。