最高等级的“培罗加”，是以白鲟的黑或灰色大鱼子制成；新鲜培罗加相当稀少，价钱也十分昂贵。
The Best grade, Beluga, is prepared from large Black or gray eggs; fresh Beluga is relatively scarce and thus expensive.
肠杆菌科细菌对美罗培南和亚胺培南的敏感率最高（100%），而对环丙沙星的敏感率仅为12%左右；
The susceptibility rate of meropenem and imipenem to ciprofloxacin was 100%, while that of Escherichia coli and Klebsiella spp to ciprofloxacin was only 12%.
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