现在，我们已经深入讨论了珊瑚白化，或者说是变白，正如你所记下的，这是珊瑚患病的一种症状。

Now, we've talked in depth about coral bleaching, or whitening, which as you recall, is a symptom of that the coral is suffering.

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你知道这个世界上有一种叫做双头白化蛇的生物吗？它居然有两个脑袋，每一条蛇都能够单独思考和进食。

Have you ever known there are such creatures as an albino two-headed snake? It has two brains. Each head, principal and subordinate, thinks and feeds separately.

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对部分海上云层进行白化会有一些美学上的吸引力，很难把它本身是为一种对环境的威胁。

Whitening some clouds has a certain aesthetic appeal; it is certainly hard to see as an environmental threat in itself.

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