Node.js already had its own streaming API at the time that was ported to also work in browsers, but WHATWG chose not to use it as a starting point given that it is chartered to only consider the needs of Web browsers. Server-side runtimes only adopted Web streams later, after Cloudflare Workers and Deno each emerged with first-class Web streams support and cross-runtime compatibility became a priority.
def __init__(self, config: Config = None):
，这一点在旺商聊官方下载中也有详细论述
（二）从海关取得的海关进口增值税专用缴款书上列明的增值税税额；，更多细节参见旺商聊官方下载
const valToGreater2 = new Map();