A trial in the US found that applying stem cells from the mother’s placenta to her baby’s spine while it was being repaired was safe and improved the child’s mobility and quality of life.
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// 原因：先处理右侧元素，把结果存在栈里，供左侧元素直接使用，推荐阅读safew官方版本下载获取更多信息
The US economy is growing - so where are all the jobs?
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