But unlike vision or hearing loss, which is often apparent to others, if not to the afflicted person, a loss of smell sensitivity with age is often undetected because it occurs gradually.

不像失明和失聪那样相对于别人(不受此问题困扰的人)常常很明显，伴随年龄增长的嗅觉丧失常常意识不到，因为它的产生我渐进的。

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The diagnosis often is delayed because symptoms are often vague, fever may not be present, and laboratory studies may have normal results.

由于症状常常不明显，可能没有发现而且实验室检查正常，容易造成诊断延误。

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Often, privately funded shelters do not accept people without the certificate. On the other hand, public shelters often cannot accept all the refugees because of their limited capacity.

而且他们离开后可能没有地方可去，因为他们必须得到健康证书来证明自己没有被核辐射才能去私人的避难所，而公家的避难所地方有限无法接纳所有难民。

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He was not to be served because he visited the bar often and did not behave well.

VOA: special.2010.01.08

an interpreted language is often easier to debug, because you can still see your raw code there, but it's not always as fast.

解释语言调试起来很容易，因为你可以看到最原始的代码，但是这种语言不够快。

麻省理工公开课 - 计算机科学及编程导论课程节选

Let's put zero here because these are not gross returns these are returns, so they're often negative.

这里做零点,注意这不是总收益,而是年度收益,有可能是负数的

耶鲁公开课 - 金融市场课程节选

Parents and doctors can often miss the initial symptoms of pertussis in the youngest patients because they often do not have the characteristic cough with a "whoop" says Patti.

CNN: 10 infants dead in California whooping cough outbreak

Patients who suffer from osteoarthritis and who also have a meniscal tear represent a challenge to medical providers because it is often not clear which condition is more adversely contributing to pain as well as their disability.

FORBES: Physical Therapy: A Reasonable Alternative to Surgery for Patients with Meniscal Tears and Arthritis

The distribution of wealth sometimes is unfair, not because of the operation of markets, but because markets so often are not allowed to operate.

FORBES: It's Time To Occupy Capitol Hill And Fight Political Greed