Title Text:I’m normally a pretty frugal person, but I still compulsively buy any R/C aircraft that’s less than $30. In the last few years, this has become a problem. Origin:https://xkcd.com/560/ https://www.explainxkcd.com/wiki/index.php/560:_Lithium_Batteries 锂电池年代记 “当你年轻的时候，你有时间却没有科技。当你年老的时候，你有了科技却没有了时间。” https://songshuhui.net/archives/50458 兰德尔认为，如果他倒退，他的生活会更好;这个想法是… Read more