训练过的犬提醒主人对如门铃，烟雾警报器和电话铃声这些重要声音提高警觉。
The trained canines alert their owners to important sounds, such as doorbells, smoke alarms and ringing telephones.
对一边响起的烟雾警报器声音，我让他们说出那个声音是什么。
Over the loud buzzing of the smoke alarm, I asked them to identify the sound.
和警报器的声音叫我的名字。
当我试用防火警报器时，声音大得使我震动。
When I tested the smoke alarm, the sound nearly knocked me off my feet.
当我试用防火警报器时，声音大得使我震动。
When I tested the smoke alarm, the sound nearly knocked me off my feet.
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