Preliminary dry samples are got quickly in microwave oven in the first step and completely dry samples are obtained in the constant temperature of oven in the second step.
2
微波炉是利用微波加热的原理和特点设计成功的一种加热设备。
The microwave oven is heating equipment by use of the heating principle of the microwave.
3
文末，对微波炉的加热原理及其安全性提出质疑。
In the end, give a query to the heating principle of microwave oven and its safety.
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