不同的用户集代表不同的行为模式和目标 —— Cooper。
User personas represent distinct sets of behavior patterns and goals. -- Cooper.
默认的事务行为是自动提交模式。在该模式下，每个语句在发送到目标服务器时进行提交。
The default transactional behavior is auto-commit mode, where each statement is committed as it is sent to the target server.
digg的目标是通过投票、评论等各种digg中统一的行为模式筛选出优质音频，成为人们在网络上寻找好的音频节目的第一站。
Their aim is for Digg to become the first stop for people looking for good podcasts, which will have standard Digg voting, discussion, etc.
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