2. 外语
  3. 当你在路边草地或自家庭院里发现一两只从未见过的甲虫时，你肯定不会感到惊讶。但在生物学家和生态学家们看来，这或许不是件寻常小事。专家们把这种原本生活在异国他乡、通过非自然途径迁移到新的生态环境中的移民称为“生物入侵者”——它们不仅会破坏某个地区原有的生态系统

当你在路边草地或自家庭院里发现一两只从未见过的甲虫时，你肯定不会感到惊讶。但在生物学家和生态学家们看来，这或许不是件寻常小事。专家们把这种原本生活在异国他乡、通过非自然途径迁移到新的生态环境中的移民称为“生物入侵者”——它们不仅会破坏某个地区原有的生态系统

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问题     当你在路边草地或自家庭院里发现一两只从未见过的甲虫时，你肯定不会感到惊讶。但在生物学家和生态学家们看来，这或许不是件寻常小事。专家们把这种原本生活在异国他乡、通过非自然途径迁移到新的生态环境中的移民称为“生物入侵者”——它们不仅会破坏某个地区原有的生态系统，而且还可能给人类社会造成难以估量的经济损失。
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答案 Of course you will not be surprised to find one or two beetles that you have never seen before on the grass near the roadside or in your yard. However, it may not be a usual thing from the perspective of biologists and ecologists. The expression of "biological invaders" is used by experts to refer to these immigrants who used to live abroad and then moved into a new ecological environment by unnatural means. The invaders may not only destroy the ecosystem of the particular place, but also cause the society a great financial loss that is difficult to measure.
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