Methods with the correlation degree way of the gray system theory, analysis patients growth and development factors and social environment factors.
方法采用灰色系统理论关联度分析，对患儿的生长发育因素和社会环境因素进行分析。
Christopher Chen of the University of Pennsylvania grew flat sheets of mesenchymal stem cells and exposed them to a mixture of growth factors for bone and marrow development.
来自宾夕法尼亚大学的克里斯托弗·陈(音译)培育了间质干细胞薄片，并将其置于有助于骨骼和骨髓发育的混合生长因子中。
Low temperature stress is one of the main environmental factors which limit plant growth, development and distribution.
低温胁迫是限制植物生长发育和分布的主要环境因子之一。
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