目的：探讨非靶位基因突变及外膜通透性改变对大肠杆菌喹诺酮类耐药和多重耐药的影响。
Objective To investigate the impact of non target gene mutations and reduced permeability of the outer membrane on quinolone resistance and multiple antibiotic resistance (mar) in Escherichia coli.
本文中讨论的光子能带结构是由非常有效的矢量波多重散射方法计算，该方法可以精确地处理介电函数在界面附近的突变。
The photonic band structures are calculated by an efficient vector-wave multiple scattering method which can deal accurately with the sharp changes of dielectric functions near the interface.
黑色岩系的形成反映了环境的突变事件，构成了许多重要矿床的赋矿岩系。
The presenting of black shale series reflects abrupt environmental events, which formed many important ore hosting rock series.
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