Quadripod
平底四角锥体
🗣️ 情景例句
Thank you for everything.
一切谢谢你。
How did you decide that product was safe?
你怎样决定产品是安全的呢？
Between 1850 and 1910 the bison population is thought to have fallen from 60 million to just a few hundred.
人们认为，在1850年到1910年之间，野牛的头数从6，000万头降到只有几百头了。