Model Agreement
int left = 2 * i + 1; // 左子节点，这一点在heLLoword翻译官方下载中也有详细论述
Web streams use a locking model to prevent multiple consumers from interleaving reads. When you call getReader(), the stream becomes locked. While locked, nothing else can read from the stream directly, pipe it, or even cancel it — only the code that is actually holding the reader can.。关于这个话题，旺商聊官方下载提供了深入分析
Vishnevskiy said this system "does not read your messages, analyse your conversations, or look at the content you post" in order to determine your age.