Normal attitude means reasonable expectation, not going to extremes, and playing it cool.

平常心就是期望值合理，做事不过分，处事淡然。

Each problem mortgage was supposed to represent a reasonable expectation that it would be paid.

每一个问题房贷的当事人都被合理要求支付欠款。

While that might not be a reasonable expectation - the fact remains that blogging is by its nature a viral medium.

虽然这可能是不大合理的期望-事实上博客根据自然的病毒模式传播。

Why should I act in such a way if I have no expectation or reasonable expectation that those around me will reciprocate ?

如果我对别人的报答，没有期望或合理的期望，我为什么要这样做?。

Because you have a reasonable expectation that the ZIP code is legitimate, it's now worth the effort to call the USPS web service.

由于您可以合理预期邮政区码是合法的，因此现在值得调用USPS Web services。