By default, a generic icon is provided if none is specified.

在缺省状态下，如果什么也没有指定，那么将会给出一个一般的图标。

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You can't just grab any old generic icon from the default set or a free icon website, it has to be something that really represents your product.

你不能从默认图标或者免费图标网站那随便找个通用图标，它必须能够真正代表你的产品。

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