Ostracodermi
甲胄鱼类
🗣️ 情景例句
How you all doing ?
你们大家怎么样？
How thick is the ice here?
这儿的冰有多厚？
After you printed the book, you had to throw away the carved pieces of wood.
你把书印出后，不得不把刻过的一片片木板扔掉。