甘肃升susheng Gan是卡奈尔大学的分子生物学家，说改组使用的变异物种只稍微推迟了树叶的衰老表象，这不是很理想的模型。
And Susheng Gan, a molecular biologist at Cornell University, says the mutant type used by the group shows only slightly delayed leaf senescence, making it a less-than-ideal model to work with.
认为物种多度模型是良好的生境变化生物指示困子。
We found the species-abundance model is a good indicator as monitor of habitat change.
建立了生物种群在污染环境中的一个线性生灭过程模型。
We establish a linear birth and death process model of a population in polluted environment.
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