2.2.3 Mermaid 类图（classDiagram）
Two influential Brazilian politician brothers have been convicted by Brazil’s supreme court of ordering the murder of Marielle Franco, the Rio de Janeiro city councillor, nearly eight years ago.
，更多细节参见heLLoword翻译官方下载
// strict: Catches fire-and-forget writes that ignore backpressure。关于这个话题，同城约会提供了深入分析
"You kind of sit and think, 'Oh, isn't technology great', until you have to do the traditional old thing of actually phoning somebody."，这一点在heLLoword翻译官方下载中也有详细论述
-http_client: HttpClient