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- It involves the use of detailed genetic information to befter manage a species' population and, in many cases, to try to coax it back from the brink of extinction. 它通过运用详细的遗传信息而更好地控制物种的数量。在许多情况下，通过耐心细致的工作使物种摆脱濒临灭绝的境况。
- The changes of above-ground biomass, species population and biotope in the grazed and ungrazed grassland in Qinghai Gong-he Basin were studied. 试验研究青海共和盆地封育季节草场生物量、种群与生境变化结果表明，封育草地生物量和株高均高于未封育草地，且依据未封育与封育草地生物量之比，共和盆地草场退化等级为中度和重度；
- By aid of the monotone iteration technique and the upper and lower solutions method, the existence of travelling wave fronts is established for a single species population model with stage structure and distributed maturation delay. 利用单调迭代和上下解方法证明了一类具有分布成熟时间和阶段结构的单物种种群模型的波前解的存在性.
- Man would have to assist in the maintenance of species populations by habitat manipulation. 人类仍将通过居住地管理来帮助保持种群体。
- Man would have to assist in the maintenance of species populations by habitat manipulation . 人类仍将通过居住地管理来帮助保持种群体。
- According to Krause, sound can also help determine how habitat destruction alters species populations. 根据克劳瑟的看法，声音可以帮助我们判定生物栖息地遭破坏时，各物种数量的改变。
- structure of algal species population 种群结构
- The results are as follows: the three species populations, in spite of the flooding, remain in congregated distribution patterns. 结果表明：三种禾草主要表现为集聚型分布，水淹干扰对同一物种种群的分布格局类型影响不显著；
- Where their ranges overlap with the spotted hyena, brown and striped species' populations are lower, due to competition for food. 其范围重叠与检举导，咖啡色条纹和物种的种群数量较低，由于竞争食物。
- Already resources are depleting, with the report showing that vertebrate species populations have declined by about one-third in the 33 years from 1970 to 2003. 资源正逐渐被耗尽。报告显示,从1970年到2003年的33年间,脊椎物种种群已经减少了近三分之一。
- Protection of biodiversity should aim at both habitats sites and individual species, so that species populations that are not found in protected areas could also be afforded protection. 保护生物多样性应兼顾生境地及个别物种的存护,让分布于保护地区以外的种群也可得到适当的存护。
- The objective of the baseline monitoring work is to detect change in underlying environmental conditions and species populations to act as a warning system against any adverse impacts. 基线监测工作的目的是要监测潜在环境情况和种群的转变,以作为防避所有负面影响的警告系统。
- Do wolves belong to the canine species? 狼是犬科动物吗？
- We should do our best to save endangered species. 我们应该竭尽全力挽救濒于灭绝的生物。
- This rare bird has become an endangered species. 这种珍禽已成为濒临灭绝的物种。
- Turn the mode dial to select multi exposure mode. 把模式盘转到多重曝光模式。
- He was wearing a strange species of hat. 他戴着一种奇怪的帽子。
- There are many species of chrysanthemum. 菊花品种很多。
- Today the survival of our species is threatened. 今天人类的生存受到了威胁。
- The Multi Commodity Exchange of India Ltd. 印度大宗商品交易所。
