以下为句子列表：
英文: A political arrangement in which various groups, such as ethnic or racial populations within a country or region, share power according to an agreed formula or mechanism.
中文: 联盟不同群体间的政治约定（如一个国家或地区内部的民族或种族），根据一个一致同意的方案或机构共享权力
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英文: Abstract: Erucic acid contents in seeds of ten populations (P1，P2，F1，RF1，F2，RF2，B1，RB1，B2 and RB2) from the cross between two genotypes of erucic acid (high and low) in Xingjiang wild rapeseed were studied.
中文: 文摘:通过新疆野生油菜高、低芥酸杂交组合正反交F1、F2、回交一代及相应的杂交亲本种子中芥酸的测定，分析了新疆野生油菜芥酸的遗传。
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英文: Accordingly, the next step, says Dr Gill, is to see how microbial populations vary between people of different ages, backgrounds and diets.
中文: 吉尔博士据此说道，接下来要弄清的是，年龄、生活背景以及饮食习惯不同的人在其所含的微生物种群上有何差异。
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英文: Actually, due to habitat fragmentation and pollution, the frog populations which used to be common in the fields and around the houses has dropped off, some of them may be heading for extinction.
中文: 事实上，过去在台湾农田与居家周围可以经常看到的青蛙族群，已经因为栖息地的破坏与环境污染而大为下降，有些也许还会走上灭绝之路。
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英文: Additionally, the growth of urban mercantile populations in Europe during the second half of the 13th century created demand for improved timekeeping devices.
中文: 此外，由于13世纪的后半，欧洲都市的商业人口持续增加，改进计时技术的需求也就愈来愈急切。
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