An existing connection was forcibly closed by the remote host.
远程主机强制关闭了现有的连接。
A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
连接尝试失败,因为被连接方在一段时间后没有正确响应,或者建立的连接失败,因为连接的主机没有响应。