1. Why is there the threat of global warming?
    为什么会有全球变暖的威胁？

2. The television receiver is an electronic device.
    电视接收器是一种电子装置。

3. The strange mechanical device is the prototype of modern cars.
    这奇怪的机械装置是现代汽车的原型。

4. The scanning laser beam was an ideal device for reading these markings, and so the Universal Product Code was born.
    能进行扫描的激光是一阅读这些标志的理想手段，因而通用条形码便应运而生了。

5. He was an inventor who invented a device to let people breathe under water.
    他是一个发明家，发明了让人能在水下呼吸的装置；

6. He called his machine an aspirator (吸气器). The huge device was powered by a steam engine.
    他称之为吸气器。这个巨大的装置是由蒸汽机带动的。

7. Another advance, a computer-controlled brain scanning device, has led to a second discovery by those seeking the biological component of mental abilities.
    另一进展，一台计算机控制的脑部扫描仪，使得寻找思维能力的生理因素的研究人员有了第二个发现。

8. (which is simply a device 10 for recording the electrical activity of the brain by attaching electrodes to the scalp) shows that while there is a change in the pattern of activity during sleep,
    显示，人在睡眠时大脑活动的方式有变化，

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