Palaechinoida
古海胆目
🗣️ 情景例句
Keep quiet, I'm trying to get some work done.
请安静，我要处理一些工作。
Excuse me! I'm sorry I startled you!
对不起！很抱歉，让你受惊了！
She was injured badly in the accident.
她在这次意外中受到重伤。