Undulata
带纹玛瑙
🗣️ 情景例句
You had better study hard.
你最好努力学习。
I meet the boy whose aunt is a TV announcer.
我遇到那个男孩的姑妈是电视播音员。
It 'flies', therefore, but it cannot fly higher---
这样，船就能飞了，但飞不高。