Echinite
n. 海胆化石
🗣️ 情景例句
That's music to my ears.
正合我意。
Better be the head of an ass than the tail of a horse.
宁为驴头，不为马尾。
It has been found that certain bats emit squeaks and by receiving the echoes,
人们发现，某些蝙蝠能发出尖叫声，