晚上吃烤红薯,突然想起一位姓付的朋友。他是我同学、发小。他不止一次地说,跟我学会了用铁锅加一个铁丝架子在煤气火上烤红薯,经常享受这香甜的健康美食。每次听的时候我都很受用。我是跟谁学的呢?怎么也想不起来了。于是有些惭愧。很多专利找不到发明 Eat baked sweet potato at night, suddenly remembered a surnamed friend. He is my classmate, made small. He said more than once that I learned to cook sweet potatoes on a gas fire with an iron pan with an iron wire shelf and often enjoy this sweet and healthy meal. Every time I listen to all I use. Who did I learn from? How can I not remember it? So some ashamed. Many patents can not find the invention