Echinoid
n. [动]海胆纲动物\\na. 海胆状的, 海胆属的
🗣️ 情景例句
It's nice meeting you.
很高兴认识你。
I will play it by ear.
我会见机行事的。
He had been the first to turn a telescope to the sky,
他是第一个把望远镜对准天空的人，