present_populations_有道手机词典

1.Efforts are aimed at preventing the depletion of present populations and ensuring the continued existence of the habitats targeted species need to survive.
这种努力的目的是在于不使目前的物种数量减少，也确保濒危品种得以生存下来。
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2.It studies these populations in the past, present and future using quantitative data and mathematical models as tools of analysis.
它使用定量数据和数学模型作为分析工具，研究这些人口在过去、现在和未来的情况。
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3.It studies these populations, in the past, present and future, using quantitative data and mathematical models as tools of analysis.
它使用定量数据和数学模型作为分析工具，研究这些物体在过去、现在和未来的数量。
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