人造无线电波有多种用途，如传送音乐或者运用微波加热食物，频谱低端的频率可以使用在诸如电视和移动电话等设备上。
The man-made sort can do things like transmit music or heat food in a microwave. At the low end of the spectrum are the frequencies used for things like television and mobile phones.
建议：使用微波炉或者冰箱之前，先用纸巾擦一下把手。饭前饭后不要忘记洗手。 。
Suggestion: % Use wet tissues to wipe the handles before using the microwave or refrigerator. And don't forget to wash your hands before and after a meal.
建议：使用微波炉或者冰箱之前，先用纸巾擦一下把手。饭前饭后不要忘记洗手。
Suggestion: Use wet tissues to wipe the handles before using the microwave or refrigerator. And don't forget to wash your hands before and after a meal.
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