People cannot hear well using only one ear.

人不能听到的，以及只用一个耳朵。

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Thomas said "Because I cannot hear well, I can work harder to invent things."

托马斯说“因为我的听力不太好，所以我才能更努力地发明东西。”

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Herzing believes that much information may be encoded in these sounds, as well as in dolphins' ultra-high frequencies, which humans cannot hear.

Herzing博士认为很多信息可能都被编码成这类声音，包括海豚的一些人类听不到的超声波。

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