南德州大学 Texas Southern University 田纳西州立大学马汀分校 the University of tennessee at 南卡罗来纳大学哥伦比亚分校 University of south carolina c ..
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"Only a small percentage of alien species cause problems in their new habitats,'' said Don Smith, professor of ecology and evolutionary biology at the University of Tennessee.
“只有一小部分外来物种会在它们的新栖息地引发问题。”田纳西大学生态学和进化生物学教授唐·史密斯说。
"Only a small percentage of alien species cause problems in their new habitats," said Don Smith, professor of ecology and evolutionary biology at the University of Tennessee.
田纳西大学生态学和进化生物学教授唐·史密斯说:“只有一小部分外来物种会在新栖息地引发问题。”
The study at the University of Tennessee selected 169 married couples under the age of 35 and asked them to fill in questionnaires every six months for four years.
田纳西州大学的这项研究选取了169对35岁以下的已婚夫妇,在四年的时间里每隔6个月请他们填一份调查问卷。
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