在许多国家，霍乱仍然是一种经常存在的危险。

Cholera remains an ever-present risk in many countries.

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经常存在的一个问题是如何对正在进行的门户环境进行人员配备。

One question that is often asked is how to staff an ongoing portal environment.

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在波多尔炎热和多灰尘的迪亚巴村，疟疾是一个经常存在的问题，尤其在雨季。

In the hot, dusty village of Diaba in Podor, malaria is an ever-present problem, especially during the rainy season.

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Then lastly, there are things like the Internet bubble, they're not usually called this, but--the lending bubble where--or the subprime mess.

其次，市场上还存在像互联网泡沫，不经常被提及的贷款泡沫,此外还有次贷危机。

耶鲁公开课 - 金融市场课程节选