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- `(_*a_*)&~(_*b_*)` = any string that contains 'a' AND does not contain 'b'
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"People don't want to be laying in a hospital waiting for care because they can't come home without the care," she says.
The boar's head standard was made from sheet bronze. It would have been held aloft in battle like a flag and used as a rallying point for troops.，推荐阅读17c 一起草官网获取更多信息
A workflow was developed to selectively capture bacterially produced compounds containing a reactive diazo chemical group. This enabled the discovery of two diazo-containing molecules from a bacterium that causes lung disease. Investigation of the bacterial synthesis of these molecules revealed an enzyme that constructs the diazo group, with broad synthetic applications.
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