优点： 输出均值更接近 0，梯度更稳定。
time.sleep(2 ** attempt) # 指数退避
July 2025: I removed the Shark Matrix RV2300S robot vacuum from this guide. While it was a solid budget mopping robot vacuum for its first year or so on the market, it's now a little bit too basic compared to other newer budget robot vacuums.，详情可参考新收录的资料
// ... function implementation
，这一点在新收录的资料中也有详细论述
Early versions of TypeScript used the module keyword to declare namespaces:，详情可参考新收录的资料
本节所称油类，是指作为运输货物或者船舶燃料的任何持久性烃类矿物油，包括润滑油。