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age spectrum中文是什么意思

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用"age spectrum"造句"age spectrum"怎么读"age spectrum" in a sentence

中文翻译手机手机版

  • 年龄谱

例句与用法

  • 40ar - 39ar age spectrum of chengjiang fauna horizon
    澄江动物群产出层位
  • The age spectrum of rhizome is very changeable during the growing season
    在生长季的不同时期,根茎的年龄结构有较大的变化。
  • At the other end of the age spectrum , state pensions systems face difficulties now , when there are four people of working age to each retired person
    而在年龄段的另一边,国家退休金系统目前面临困难,每四个工作的人负担一个退休人员。
  • The tiller - nodes of 6 species of rhizome grass , including leymus chinensis , hemarthriajaponica , arundinella hirta , calamagrostis epigeios , c . rigidula , hordeum brevisubulatum in songnen plain , can live at best for 2 to 5 years , and do 2 to 4 propagating generations which is the same as the age class of tiller in number . the age structure of population is an increasing model which the young tiller is more than the old at quantity and biomass . during the whole growing season , the age spectrum varies for each species
    松嫩平原,羊草、牛鞭草、野古草、拂子茅、硬拂子茅和野大麦等6种根茎型禾草种群的分蘖节最多可以存活2 5个年度,可以进行营养繁殖2 4个世代,分蘖株的龄级数与分蘖节营养繁殖的世代数相同,在种群分蘖株的数量和生物量上,生长季的各个时期均以幼龄分蘖株占较大比例,呈现为明显的增长型年龄结构,各种类的年龄谱组成各异。
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