deborah withington of sound alert says that the alarms use most of the frequencies that can be heard by humans.
该公司的戴博拉-威星顿称此种警器使用人类可以听到的大部分音频。
the former pupil at audenshaw's poplar street primary is studying at withington girls' school and starts at altrincham grammar school for girls in september.
妮诗原来就读于奥顿肖杨树街小学,现在就读于威辛顿女子学校,今年九月会进入奥尔特林厄姆女子语法学校。
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