孩子们把所有的食物都端进来时，老妇人哇哇大叫，让她的客人们很高兴。
As the kids carried all the food in, the old woman oohed and aahed—much to her visitors' pleasure.
一些孩子们把一个动作传感器和一个蜂鸣器结合起来，这样当他们的兄弟进来时，他们发出警报声。
Some kids combine a motion sensor and a buzzer so that the alarm sounds when their brother comes in.
一些孩子们把一个动作传感器和一个蜂鸣器结合起来，这样当他们的兄弟进来时，他们发出警报声。
Some kids combine a motion sensor and a buzzer so that the alarm sounds when their brother comes in.
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