await writeToStorage(forStorage);
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.
。关于这个话题，im钱包官方下载提供了深入分析
增值税法第三条所称无形资产，是指不具实物形态，但能带来经济利益的资产，包括技术、商标、著作权、商誉、自然资源使用权和其他无形资产。
略好一点，没以前油了，风格化处理还是不太行