Anharmonicity
非諧性
??? 情景例句
Come on, Robbie.
走吧 Robbie。
I've never read a more fascinating story.
我沒有讀過比這更令人著迷的故事。
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.
不僅能夠確定魚群的位置，而且可以根據魚群回聲的特點分辨出是鯡魚、鱈魚，這是人們所熟悉的其他魚。