Pinnigrade
a. & n.用鳍(或鳍状肢)行走的(动物)
🗣️ 情景例句
Are the bathrooms on this train clean?
火车上的卫生间干净吗？
Small gains bring great wealth.
小益聚大财，薄利成巨富。
When several elephants are being trained at one time,
几只象同时训练时，