Although it's difficult to say what the most harmful invasive species is, "I'd probably point to West Nile virus, " says Christopher Dionigi of the federal National Invasive Species Council (NISC).
尽管难以断言哪种外来入侵物种最为有害，联邦全国外来入侵物种委员会（NISC）的克里斯托弗·迪奥尼基表示，“我认为是西尼罗河病毒。”
Although it's difficult to say what the most harmful invasive species is, "I'd probably point to West Nile virus, " says Christopher Dionigi of the federal National Invasive Species Council (NISC).
尽管难以断言哪种外来入侵物种最为有害，联邦全国外来入侵物种委员会（NISC）的克里斯托弗·迪奥尼基表示，“我认为是西尼罗河病毒。”
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