Now, as these two oscillating fields move across space, that is what is known as an electromagnetic wave.

现在，当这两个振荡场在空间中移动时，这就是我们所说的电磁波。

In the handheld scanner, a small wire coil creates an oscillating magnetic field, which makes the glass sliver in the sticker vibrate in sympathy.

而在手持扫描仪内部的小线圈创建的一个振荡磁场使得在贴纸内的玻璃棉条同时产生震动。