Two possible types of event can be sent, either buy or sell.
可以发送两种可能的事件类型，buy或sell。
There can be one of the two possible types of SOAP responses
响应将可能是两种类型的 SOAP 响应中的一种
It is possible that two DPARs can have very different resource utilizations, even though they have the same number of registered users, the same number of active users, and the same types of clients.
即使条目具有相同的已注册用户数、相同的活动用户数和相同的客户机类型，两个DPAR也可能具有不同的资源利用率。
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