The mother didn't realize the child was within hearing range.
母亲没有意识到孩子就在旁边，听得见。
The unit generates noise at all frequencies across the human hearing range.
它能产生所有频率的声音，覆盖了整个人类的听力范围。
They have but again come within your range of vision and hearing.
它们只不过再次出现在你视觉与听觉的范围之内。
Range expanding the hearing and participating in people further;
进一步扩大听证参与人的范围；
Range expanding the hearing and participating in people further;
进一步扩大听证参与人的范围；
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