In many parts of the world, the characteristic 1 croaking has been suddenly stilled in recent years. 2 Amphibians are in serious trouble with one third of 3 species at risk of 4 extinction.

在世界上许多地方，别具特色的蛙声最近几年突然沉寂了。两栖动物目前正处于水深火热之中，三分之一的物种面临灭绝。

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The important characteristic of this is shown in Figure 1, where you can see the growth is not linear.

图1中显示了一些重要特征，在那你可以看到增长并不是线性的。

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As you can see in Figure 1, the human voice produces a distinct average of characteristic frequencies when speaking.

如图1所示，人类语音在说话时将生成独特的平均特征频率。

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But as it has expanded to host over 1, 000 stores in 44 countries across Europe and Asia, that distinctive characteristic has been compromised, creating an identity crisis.

FORBES: British Retailer Marks & Spencer Struggles To Do It All