了解寄生虫是怎样跳种种障碍是了解传染性疾病是怎样在人类之间传播的关键所在——最近一个迁徙的例子也在这周公布了。
Understanding how parasites leap species barriers is crucial to understanding how new infectious diseases start in humans—and an example of a recent leap was also published this week.
有一位环保主义者认为，大楼如此之高，将会危及喜欢夜间迁徙的鸟类安全，因为飞鸟完全可能“砰”地一声撞在冷不丁出现的障碍物上。
Such tall buildings, a conservationist there protested, would interfere with the night migration of birds, which would bang into the unexpected obstructions.
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