With the increasing patients with Severe immune deficiency disorder a nd hypoimmunity, Deep-seated fungal infection has become a harsh problem day by day.

随着严重免疫缺陷疾病患者及免疫力低下患者的增加，深部真菌感染已经成为一个日益严峻的问题。

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The theory of risk management, which is maturing day by day in western countries, provides the study of this problem with theoretical basis.

西方国家日渐成熟的风险管理理论为这一问题的研究提供了理论基础。

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Therefore, the university library network security problem becomes day by day important.

因此，高校图书馆网络安全问题变得日益重要。

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Wales had a higher proportion of residents reporting that their day-to-day activities were limited a little or a lot by a long-term health problem or disability (23%) than any English region.

BBC: Census 2011: Number of Welsh speakers falling