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更有利于个体适应环境和生存繁衍的突变产生后,在被选择固定的过程中,与之紧密连锁的染色体区域由于搭车效应(hitchhiking effect)也被固定下来,由此导致基因组区段多态性下降的现象。
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railway dedicated communication system
railway direct power supply traction network
railway dispatch communications system
railway ecological protection
railway e-commerce
railway electric power supply
railway electric power supply system for highland
railway emergency communication system
railway emergency platform
railway emergency rescue
railway employee health management
railway energy consumption during the operation
railway engineering
railway engineering geophysical exploration
railway engineering survey
railway environment noise
railway environment vibration
railway express for less-than-carload freight
railway fecal sewerage collection and discharge
railway flat car
railway food hygiene
railway foundation treatment
railway freight car
railway freight transportation
railway geographic information system
科学参考收录了854744条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。
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