Placoderm
n. [古生]盾皮鱼
🗣️ 情景例句
Well, in 1919.
是的，在1919年。
Mike found it difficult to adjust at first, but he's used to studying at Harvard now.
刚开始迈克发现很难适应在哈佛的学习，但现在他已经习惯了。
I don't know. I haven't made up my mind yet.
不知道。我还没下定决心呢。