On the basis of the disease evolution of Xinzhuangling Highway Tunnel in loess, the disease reasons are analyzed through numerical simulation and field observation.

针对新庄岭黄土公路隧道地表裂缝和衬砌开裂的病害特征，探讨了病害产生机理，并运用仿真、实测等手段详细分析了病害原因。

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Zebras' thin coats make them more vulnerable than long-haired animals to biting flies that carry disease, but the coats stripes prevent flies from landing on them, for reasons that scientists are still studying.

斑马很薄的皮毛使它们比长毛动物更容易受到携带疾病的苍蝇的叮咬，但是斑马身上的条纹可以防止苍蝇落在它们身上，科学家仍在研究其原因。

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These reasons make them a good model for human disease.

这些原因使它们成为用于人类疾病研究的良好模型。

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They could say, "Oh, disease," but these reasons tend not to be sincere.

他们可以说”会传染疾病“,但这些理由只是托辞。

耶鲁公开课 - 心理学导论课程节选

Scholars have suggested, among other reasons, disease, political upheaval, overpopulation or drought.

UNESCO: Culture

The curious life cycle of the parasite, called plasmodium, is one of the reasons why the disease has proved so difficult to control.

BBC: Venom to arm mosquito against malaria

Cancer is a very lonely disease and one of the reasons why it feels lonely, seems lonely, is this axiomatic belief that it's not transmissible.

NPR: Startling New Evidence Cancer Is Contagious