Echinopluteus
[动]海胆幼体
🗣️ 情景例句
It's a beautiful day.
今天天气真好。
Children learn to creep ere they can go.
孩子要走路，先得学爬行。
The undulating waves of the open sea are generated by three natural causes:
海浪是由三个自然因素形成的：