Biodetritus
生物碎屑
🗣️ 情景例句
What was that?
会是什么呢？
No wonder!
这也难怪！
It is thought that they arrived more than 30,000 years ago by crossing a land bridge from Asia to America.
他们被认为是在3万多年以前从亚洲跨越一座陆桥来到美洲的。