“比如干细胞、细胞疗法、噬菌体疗法这些新疗法现在看来没有什么问题（获益大于风险），但在大量群体、长期随访观察下，会不会出现（更多）风险还不知道。”朱同玉说。
First, we make a simple observation: given some number r, we can always split it into an integer part v and a fractional part x that satisfies 0 ≤ x
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This is not limited to critical systems. Any non-trivial engineering project where bugs are expensive (which is most of them) accelerates when correctness is cheap.，更多细节参见谷歌浏览器【最新下载地址】
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