Grafing
分级复联
🗣️ 情景例句
Thank you, sir.
谢谢您，先生。
Beautiful day, isn't it?
今天天气真好，是不是？
it is now possible not only to locate a shoal but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.
不仅能够确定鱼群的位置，而且可以根据鱼群回声的特点分辨出是鲱鱼、鳕鱼，这是人们所熟悉的其他鱼。