// 栈不为空时才判断（避免访问stack.at(-1)时报错）
Even with dopamine, STDP struggles to train massive, deep networks (the Credit Assignment Problem rears its head again). If your brain doesn’t use backprop, how do you learn to play the piano or write code?
，这一点在Line官方版本下载中也有详细论述
Что думаешь? Оцени!。业内人士推荐同城约会作为进阶阅读
Listen to highlights from Lincolnshire on BBC Sounds, watch the latest episode of Look North.
Here are my top-level takeaways from investigating this issue: