The sound waves were so huge (about 20,000 light years in length) and so low (about 50 octaves below hearing range) that the astronomer had to adjust them to the range of human hearing.
这种声波如此巨大(大约2万光年长)又如此低沉(大约低于听力范围50个八度)，所以天文学家对它进行必要的调整后，人才能听到。
The sound waves were so huge (about 20, 000 light years in length) and so low (about 50 octaves below hearing range) that the astronomer had to adjust them to the range of human hearing.
这种声波如此巨大(大约2万光年长)又如此低沉(大约低于听力范围50个八度)，所以天文学家对它进行必要的调整后，人才能听到。
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。
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。
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