Each morning they rise up in vast, graceful waves and fly to fields nearby, where they spend their days assiduously feeding on waste corn the harvesters missed and earthworms and other invertebrates.
每天早上，它们从广阔优美的波浪中起飞，飞到附近的田野，全力以赴地吃着收获者遗留下来的玉米和蚯蚓及其它无脊椎动物。
When light waves enter normal materials such as glass, the material alters the electric and magnetic fields in the light, slowing the waves to a particular new speed.
当光波进入普通材料时，如玻璃，这些材料改变了光波中的电磁场，使光波降低到某一新的速度。
Radiofrequency waves are electromagnetic fields, and unlike ionizing radiation such as X-rays or gamma rays, cannot break chemical bonds nor cause ionization in the human body.
射频波就是电磁场，但是与X射线或伽玛射线辐射等电离辐射不同的是，射频波不会打破化学键，也不会给人体造成电离辐射伤害。
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