Arbors grow fast with good stem shape and good timber.

乔木的干形好、材质优良、较速生。

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Attempts to grow replacement bone by placing stem cells in a culture chamber of the desired shape have not been very successful, with the cells often dying or producing only weak bone.

以前通过将干细胞置于特定性状的培养腔内，以培育出再造骨骼的尝试并不太成功，细胞往往会死亡，或者仅培育出很脆弱的骨骼。

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They then injected the bone marrow stem cells into the animals' corneas. After just one week, the abnormal corneas began to change shape and heal.

接着它们将骨髓干细胞注入小鼠眼角膜。仅仅一周后，异常眼角膜就开始改变形状，并且开始痊愈。

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She knows that pursuing STEM studies is a win-win situation: students prepare themselves for exciting future careers and NASA helps shape the scientists, engineers and explorers of tomorrow.

FORBES: NASA, Got Space Exploration? Get Goals, Get Funding and Get Uhura.