Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04
tee() splits a stream into two branches. It seems straightforward, but the implementation requires buffering: if one branch is read faster than the other, the data must be held somewhere until the slower branch catches up.，这一点在爱思助手下载最新版本中也有详细论述
Implementers shouldn't need to jump through these hoops. When you find yourself needing to relax or bypass spec semantics just to achieve reasonable performance, that's a sign something is wrong with the spec itself. A well-designed streaming API should be efficient by default, not require each runtime to invent its own escape hatches.，推荐阅读同城约会获取更多信息
next_url = None。谷歌浏览器【最新下载地址】对此有专业解读