The group of scientists said that plants are not as quiet as we had always thought, but in fact their voices are so high-pitched that we just can't hear them.
这群科学家称，植物并不像我们一直以为的那般安静，事实上，它们的声音频率极高，高到我们根本听不到。
Now, this is high-pitched hearing loss, so a person can still hear sounds and understand most speech.
这是一种对高声调的声音听力丧失，所以她/他仍可以听清楚并且明白大多数的日常对话。
So I just nodded and pretended to have a coughing fit, but it was pretty high pitched.
所以我只是点点头，假装咳嗽发作，但声调却很高。
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