Among them: flowerpots whose color warns when the soil is drying out, blackboards using water instead of chalk that could be erased by a pulse of heat, and even cars that change color in the rain.
A clothes drier is designed for the purpose of generating heat, so you can avoid bringing more heat into your home bydrying your clothes on a line (or anything you can hang them on, for that matter).
衣物烘干机是以产生热量为目的,所以你可以把衣服挂在绳子上晾干来避免室内产生更多的热量。
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That is, the heat is transferred to the material as it contacts the dryer's heated surface, drying the material by conduction.