Poor brain development causes learning disabilities in 2% to 3% of the population, but the problem is more prevalent in males.

有2%到3%的人因大脑发育不良而引发学习障碍，但这类学习障碍者绝大多数是男性。

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The qualitative analysis and quantitative study show that the difference of the fracture development causes the major reservoirs not absorb water.

从定性分析和定量研究可以看出，裂缝发育程度差异是主力油层不吸水的主要原因。

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Economic development both causes deforestation and slows it.

ECONOMIST: Forests and how to save them

Researchers also hope that stem cell research will provide them with more information about human development and the causes of disease, and lead to changes in the development and testing of drugs.

CNN: NIH publishes draft guidelines for stem cell research

To raise international awareness of the disease's causes, development and cures, the WHO declared March 24 World TB Day.

CNN: The Killer Cough