缺点：负区间可能“死亡”，即神经元永远不激活
for await (const chunks of input) {
，更多细节参见safew官方版本下载
let weights[palette size] = weight for each colour
* 核心功能：每次调用next(val)，返回当前价格的跨度（往回数≤当前价格的最大连续天数）
People who believe they contribute to society are more likely to vote and engage in politics. They were also more likely to donate to and volunteer for political causes compared to individuals who saw their contribution to society as smaller.
· 杨勇 · 来源：tutorial资讯