If any one character of a message is changed, then up to half of the message digest changes.
如果改变了消息中的一个字符，那么消息摘要中大约有一半字符要改变。
2
A response message is returned as character LOB (CLOB) if issued by the server.
如果由服务器发出，则响应消息作为字符lob (CLOB)返回。
3
Though there's an advanced version with other options, the default way to add a reminder is through a 140 charactermessage typed out in natural language.