The mutation is rare, but cases have been recorded across the world.
尽管发生在鸭子身上的这种基因突变实属罕见，但类似情况此前在世界其他地区也有过报道。
We live in an interconnected world, but the crisis is felt differently across the globe.
我们生活在一个相互联系紧密的世界上，但是全球受危机影响的程度却参差不齐。
But as the shadow once again crawls across our world.
但是当阴影再一次掠过我们的世界的时候。
But as the shadow once again crawls across our world.
但是当阴影再一次掠过我们的世界的时候。
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