* 时间复杂度：O(n)，空间复杂度：O(1)
"Do your homework, listen to your teacher, pay attention in class and read books, and that will give you something to focus on," she says in a matter-of-fact way.。heLLoword翻译官方下载对此有专业解读
iFi's new DAC is eight percent smaller than the previous GO Link and 29 percent lighter, approaching the size of Apple's USB-C to 3.5mm Headphone Jack dongle. The GO Link 2's built-in ESS Sabre DAC chipset is supposed to add "6dB of dynamic range between the loudest and quietest moments" and reduce distortion for clearer sound by up to 62 percent when compared to the original GO Link.，这一点在51吃瓜中也有详细论述
* At the end of this file, create a work in progress log, where you note what you already did, what is missing. Always update this log.，更多细节参见服务器推荐